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{{Short description|Hybrid fish}}
{{Multiple issues|
{{Multiple issues|
{{Close paraphrasing|article|source=https://web.archive.org/web/20090729075326/http://www.flowerhorncraze.com:80/Flowerhorn-101-t43104.html|talk=Probable copyvio|date=December 2018}}
{{More citations needed|date=March 2009}}
{{More citations needed|date=March 2009}}
{{Unreliable sources|certain=yes|date=December 2018}}
{{Unreliable sources|certain=yes|date=December 2018}}
}}
}}
[[File:Gallery 19 68 148247.jpg|thumb|right|Golden Base type flowerhorn]]
[[File:Gallery 19 68 148247.jpg|thumb|right|Golden Base type flowerhorn]]
'''Flowerhorn [[cichlid]]s''' are ornamental [[aquarium]] fish noted for their vivid colors and the distinctively shaped heads for which they are named. Their head protuberance, or ''kok'', is formally termed a [[Nuchal lines|nuchal]] hump. Like [[blood parrot cichlid]]s, they are [[Cichlid#Hybrids and selective breeding|man-made hybrids]] that exist in the wild only because of their [[Fishkeeping#Invasive species|release]]. Flowerhorns first emerged for sale on the aquarium market in Malaysia in the late 1990s and soon became popular in many countries in Asia. First developed in [[Malaysia]], [[Thailand]], and [[Taiwan]], they became very popular with Asian [[Fishkeeping|fish hobbyists]]. They are also kept by hobbyists in the US and Europe. Numerous cast-off flowerhorns have been released to the wild, especially in Singapore and Malaysia, where they have become an [[Invasive species|invasive pest animal]]. Their importation is banned in Australia.
'''Flowerhorn [[cichlids]]''' are ornamental [[aquarium]] fish noted for their vivid colors and the distinctively shaped heads for which they are named. Their head protuberance is formally called a [[Nuchal lines|nuchal]] hump. Like [[blood parrot cichlid]]s, they are [[Cichlid#Hybrids and selective breeding|hybrids]] that exist in the wild only because of their [[Fishkeeping#Invasive species|release]]. Flowerhorns first emerged for sale on the aquarium market in Malaysia in the late 1990s and soon became popular in many countries in Asia. They are commonly kept by hobbyists in the US, Asia, and Europe. Numerous cast-off flowerhorns have been released to the wild, especially in Singapore and Malaysia, where they have become an [[Invasive species|invasive pest animal]]. Their importation is banned in Australia.


== Origin ==
== Origin ==


Flowerhorn breeding dates to 1993.<ref name="craze">{{cite web |url=http://www.flowerhorncraze.com/Flowerhorn-101-t43104.html |title=Flowerhorn 101: A Guide to Flowerhorn Strains and Types |date=January 4, 2009 |work=FlowerHornCraze.com |archive-url=https://web.archive.org/web/20090729075326/http://www.flowerhorncraze.com/Flowerhorn-101-t43104.html |archive-date=29 July 2009 |url-status=dead |access-date=9 December 2018 }} {{self-published inline|date=December 2018|reason=Just some pseudonymous blog post.}}</ref>{{unreliable source?|certain=yes|date=December 2018|reason=Just some pseudonymous blog post, from which most of the text in our "article" was copy-pasted then slightly modified.}} Taiwanese and Malaysians admired fish with protruding heads, known as '[[giant gourami|kaloi]]' or 'warships', found in the western part of the nation. The slightly protruding forehead and long tail of these fish were prized in Taiwanese society as bringing luck in [[geomancy]]. By 1994, [[Amphilophus labiatus|red devil cichlids]] (typically ''[[Amphilophus labiatus]]'') and trimac cichlids (''[[Amphilophus trimaculatus]]'') had been imported from [[Central America]] to Malaysia and the hybrid blood parrot cichlid had been imported from Taiwan to Malaysia and bred these fish together, marking the birth of the flowerhorn.{{Dubious|date=October 2009}}
Flowerhorn breeding dates to 1993.<ref name="craze">{{cite web |url=http://www.flowerhorncraze.com/Flowerhorn-101-t43104.html |title=Flowerhorn 101: A Guide to Flowerhorn Strains and Types |date=January 4, 2009 |work=FlowerHornCraze.com |archive-url=https://web.archive.org/web/20090729075326/http://www.flowerhorncraze.com/Flowerhorn-101-t43104.html |archive-date=29 July 2009 |url-status=dead |access-date=9 December 2018 }}</ref>{{self-published inline|date=December 2018|reason=Just some pseudonymous blog post.}}{{unreliable source?|certain=yes|date=December 2018|reason=Just some pseudonymous blog post, from which most of the text in our "article" was copy-pasted then slightly modified.}} Taiwanese and Malaysian peoples admired fish with protruding heads, known as '[[giant gourami|kaloi]]' or 'warships', found in the western part of the nation. The slightly protruding forehead and long tail of cichlids were prized in Taiwanese society as bringing luck in [[geomancy]]. By 1994, red devil cichlids (typically ''[[Amphilophus labiatus]]'') and trimac cichlids (''[[Amphilophus trimaculatus|A. trimaculatus]]'') had been imported from [[Central America]] to Malaysia and the hybrid blood parrot cichlid had been imported from Taiwan to Malaysia. These fish were then bred together, marking the birth of the flowerhorn.{{Dubious|date=October 2009}}{{Citation needed|date=April 2022}}

In 1995, the blood parrots were further crossbred with the Human Face Red God of Fortune, which produced a new breed called the Five-colors God of Fortune. With its beautiful colors, this fish quickly became popular. Selective breeding continued through 1998, when the Seven-colors Blue Fiery Mouth (also known as Greenish Gold Tiger) was imported from Central America, and crossbred with the Jin Gang Blood Parrot from Taiwan.<ref name="craze" />{{unreliable source?|certain=yes|date=December 2018|reason=Just some pseudonymous blog post.}} This crossbreeding led to the first generation of {{lang|nan-Latn|hua luo han}} flowerhorn hybrids (often generically called luohans in English), which were then followed by subsequent flowerhorn introductions.


=== Arrival in the West ===
=== Arrival in the West ===
{{unreliable sources|section|reason=The only source cited (ref name="craze") is just some pseudonymous blog post.|date=December 2018}}
{{unreliable sources|section|reason=The only source cited (ref name="craze") is just some pseudonymous blog post.|date=December 2018}}
When luohans were first imported to the United States, there were only two varieties of these fish for distribution, flowerhorn and golden base.<ref name="craze" /> Flowerhorns came in two varieties, those with pearls (silver-white spots on the skin) and those without. Golden bases also had two varieties, those that faded and those that did not. Among the flowerhorns, the ones without pearls were quickly overtaken in popularity by those with pearls, becoming pearl-scale flowerhorns, which were developed into the Zhen Zhu variety. Within the golden bases, the unfaded ones developed an attractive golden skin in place of what had been the flowerhorn's grey skin.
When luohans were first imported to the US, there were only two varieties of these fish for distribution: the flowerhorn and the golden base.<ref name="craze" /> Flowerhorns came in two varieties; those with pearls (silver-white spots on the skin), and those without.

By 1999, there were four varieties of flowerhorn available in the American market: regular flowerhorns, pearl-scale flowerhorns, golden flowerhorns, and faders.<ref name="craze" /> Commercial breeders proliferated, and fish were selected for appearance with little regard for terminology.<ref name=craze/> Consequently, names became confusing and parentage became difficult to track.

Around 2000 to 2001, the Kamfa variety appeared. These were hybrids of any type of flowerhorn crossed with any species of the genus ''[[Vieja]]'' or with any parrot cichlid.<ref name="craze" /> These brought in some new traits, such as short mouths, wrapped tails, sunken eyes, and increasingly larger head bumps. Seeing this, those who bred the Zhen Zhus began line breeding their fish to develop faster and become more colorful, in order to compete with the Kamfa strains.<ref name="craze" />


==In captivity==
==In captivity==
Flowerhorn cichlids have a lifespan of 10–12 years. They are usually kept at a water temperature of 80&ndash;85&nbsp;°F, and a [[pH]] of 7.4&ndash;8.0. They require a tank of a minimum of 40 gallons, with 75 gallons optimal. A breeding pair may require a tank of 150 gallons or more, depending on size. Being aggressive and territorial, two or more flowerhorns are usually not kept together, but the tank housing them can be divided up with acrylic dividers or egg crates.


There are several ways by which breeders distinguish between male and female flowerhorns. Generally, the males are larger than the females, but there are some exceptions. Males have the kok, or the nuchal hump, on their foreheads. Males also usually have brighter and more vivid colors. For most breeds, the females have black dots on their [[dorsal fin]]s, whereas males usually have longer anal and dorsal fins. Females tend to have an orange belly, especially when ready to breed. The mouth of the male is thicker and more pronounced than the female's. One sure way to determine the sex of flowerhorn is that grown female will lay eggs every month even without the male.<ref name="ThaiFH">{{Cite web |url= http://www.thaifh.com/flowerhorn-guides.html |title=Flowerhorn sex (louhan sex) |date=May 1, 2015 |access-date=February 5, 2016 |work=ThaiFH.com}}</ref>{{self-published inline|date=December 2018|reason=This is just some fish-vendor's website. It is not a reliable source.}}
There are several ways by which breeders distinguish between male and female flower horns. Generally, the males are larger than the females, but there are some exceptions. Males have the kok, or the nuchal hump, on their foreheads. Males also usually have brighter and more vivid colors. For most breeds, the females have black dots on their [[dorsal fin]]s, whereas males usually have longer anal and dorsal fins.<ref name="ThaiFH">{{Cite web |url= http://www.thaifh.com/flowerhorn-guides.html |title=Flowerhorn sex (louhan sex) |date=May 1, 2015 |access-date=February 5, 2016 |work=ThaiFH.com}}</ref>{{self-published inline|date=December 2018|reason=This is just some fish-vendor's website. It is not a reliable source.}}


Flowerhorn cichlids are subject to several diseases, including [[head and lateral line erosion|hole-in-head disease]], [[Ichthyophthirius multifiliis|"ich"]], and digestive blockages.
Flowerhorn cichlids are subject to several diseases, including [[head and lateral line erosion|hole-in-head disease]], [[Ichthyophthirius multifiliis|"ich"]], and digestive blockages.
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== Varieties ==
== Varieties ==
{{unreliable sources|section|certain=y|reason=With one exception, the only source cited (ref name="craze") is just some pseudonymous blog post.|date=December 2018}}
{{unreliable sources|section|certain=y|reason=With one exception, the only source cited (ref name="craze") is just some pseudonymous blog post.|date=December 2018}}
[[File:Post-77-1231053436.gif|thumb|left|450px|General flowerhorn variety classification, containing several subsets of varieties (strains) from different countries and breeders.]]
[[File:Post-77-1231053436.gif|thumb|200px|General flowerhorn variety classification, containing several subsets of varieties (strains) from different countries and breeders.]]
The original flowerhorn hybrid stock are referred to as luohans (from the Chinese word for the [[Buddhism|Buddhist]] concept of {{lang|sa-Latn|[[arhat]]}}). The four main derived varieties are Zhen Zhu, Golden Monkey, Kamfa, and the golden base group,<ref name="craze" /> which includes Faders and the Golden Trimac. They are sometimes referred to as [[breed]]s, though that term technically only refers to varieties of fully [[Domesticated animal|domesticated species]].
The original flowerhorn hybrid stock are referred to as luohans (from the Chinese word for the [[Buddhism|Buddhist]] concept of {{lang|sa-Latn|[[arhat]]}}). The four main derived varieties are zhen zhu, golden monkey, kamfa, and the golden base group,<ref name="craze" /> which includes faders and the golden trimac. They are sometimes referred to as [[breed]]s, though that term technically only refers to varieties of fully [[Domesticated animal|domesticated species]].

=== King Kong Parrots and Red Ingots ===

[[Blood parrot cichlid]]s were the earliest defined type of cichlid hybrid, whereas the King Kong Parrot represents an early stage in the transition to flowerhorn breeding. The blood parrots are smaller, with a bigger head, more protruding eyes, and a V-shaped mouth. The King Kong Parrot is longer, with a reddish orange color, and a [[dorsal fin]] shorter than the [[anal fin]]. The shape of the King Kong is similar to the red devil cichlid, and, when it reaches a size of 18&nbsp;cm, the shape of the mouth changes to a triangle with a more protruding jaw. Only 20% of these fish grow to a size of a half kilogram.<ref name="craze" />

King Kong Parrots are sometimes colored purple or blue by [[painted fish|pigment injection]]. This practice is unhealthy for the fish, and the color will fade with time.<ref name=craze/> Parrot cichlids fed with natural colorants and attractants naturally develop a red color. With further breeding, a round body shape has been selected, with the dorsal fin and anal fin longer than the tail fin, and the mouth can open and close naturally. These fish have clear eyes, and 90% of them grow to 1&nbsp;kg or above, with the characteristic flowerhorn head shape.<ref name="craze" />

The Red Mommon and Red Ingot varieties are the most typical of these hybrid cichlids. Both of these fishes are appreciated for [[feng shui]].<ref>{{cite news |last=Arnold |first=W. |date=July 1, 2003 |title=Singapore's 'lucky' pet luohan can outnumber people in homes |work=International Herald Tribune}}</ref> The Red Mommon is named for its high forehead, which looks like the hat worn by the God of Fortune. The Red Ingot is named for its ''yuan-bao'' shape, referring to odd-shaped gold or silver pieces formerly used as money in China.<ref name="craze" />

The Red Mommon and Red Ingot grow faster in the first year, with a size of about 20&nbsp;cm. They grow to 25&ndash;28&nbsp;cm by two years later. Their maximum size is not yet known, and it is believed that the fish may grow to 30&nbsp;cm or above in the future. Both of these fish are raised at 28&nbsp;°C water temperature, pH ~6&ndash;8 (with slightly acid water preferred), and [[carbonate hardness|kH]] ~3&ndash;6, while avoiding any sudden change in water quality. It is also common to test regularly for [[ammonia]] and [[nitrite]]. Both of these fishes can be bred with different kinds of cichlids.<ref name="craze" />


=== Golden Monkey ===
=== Golden Monkey ===
[[File:Post-19-1231048027.jpg|thumb|right|274px|Golden Monkey]]
[[File:Post-19-1231048027.jpg|thumb|Golden Monkey]]
⚫
It can be a particularly expensive flowerhorn, carrying a price tag of more than one thousand dollars. The most expensive Golden Monkey was sold for $600,000 during a Malaysian exhibition in 2009.
The genuine Golden Monkey (also called Good Fortune) or Kamalau was bred by Lam Seah and Lam Soon in Bercham, Ipoh, Malaysia. After the third generation, all of them were sold to the A-1 Aquarium in 2001. This type of flowerhorn is an original luohan-based fish and not a mixed-type Zen Zhu or Kamfa.<ref name="craze" />

⚫
It can be a particularly expensive flowerhorn, carrying a price tag of more than one thousand dollars. The most expensive Golden Monkey was sold for $600,000 dollars during a Malaysian exhibition in 2009.
{{Clear}}

=== Kamfa ===
[[File:Post-19-1231048629.jpg|thumb|left|275px|Kamfa]]
This variety originated directly from the luohan. Its main characteristics are white or yellow eyes (red eyes are possible but not common), a fan tail, a water-colored head bump, sunken eyes, and smaller lips than the Zhen Zhu. This variety generally also has a larger and more square body than that of the Zhen Zhu. Head flowers can be found on the Kamfa, but not as prominently as with Zhen Zhus.
{{Clear}}


=== Zhen Zhu ===
=== Zhen Zhu ===
This variety originated slightly after the Kamfa, derived from the luohan. It has a rounded tail, large mouth, red protruding eyes, and a prominent head flower. Zhen Zhu means 'pearl flowerhorn'. This variety's strongest characteristic is pearling. Breeders often cross other types with Zhen Zhus because they breed easily and can create better pearling (flowerline) for the next generation. Weak tails can also carry over, however.<ref name="craze" />
This variety originated slightly after the Kamfa, derived from the luohan. It has a rounded tail, large mouth, red protruding eyes, and a prominent head flower.<ref name="craze" />

=== Golden base ===
[[File:Gallery 19 68 148247.jpg|thumb|right|300px|Golden Base]]
Golden base is a group of multiple varieties, including Faders and Golden Trimac.<ref name="craze" /> Faders are called by that name because during the juvenile period of life they first lose their color and go completely black then, as the fading process continues, the black fades away, leaving a more vibrant color, usually yellow or red.

[[Cichlid#Hybrids and selective breeding|Red Texas]] cichlids are related to the golden base family of flowerhorns. They were originally created by breeding a [[Herichthys carpintis|green Texas cichlid]] with a Mommon or King Kong parrot, then crossing the offspring back to the parents until a consistent red color was achieved. Hobbyists consider the most important feature of the red Texas to be the color. Red Texas cichlids range in colors, and are rated as:

* Unfaded: lowest grade of red Texas.
* Yellow: second lowest grade.
* Orange: the majority of red Texas fall into this category.
* Coral: pinkish but not quite full red.
* Red: most desirable color.

The second characteristic that sets the red Texas apart is the pearling. Red Texas can vary greatly in terms of the type of pearling.<ref name="craze" />


=== King Kamfa ===
=== King Kamfa ===
[[File:Kingkamfa.jpeg|thumb|237x237px|King Kamfa]]
[[File:Kingkamfa.jpeg|thumb|King Kamfa]]
From the Kamfa family, these Flowerhorns are known for their massive nuchal humps, also called a kok, and their strikingly varied patterning. This fish typically has white or yellow sunken eyes, although red eyes are possible but rare. Distinctive features of this strain include an intense black double flower row along the [[lateral line]], and very thick white pearling. Originating in Thailand, this strain has seen a recent rebirth in Vietnam. The body is typical of a Kamfa, with a fan tail, and a longer body than some other Kamfas.<ref name="craze" /> King Kamfa is the most expensive flowerhorn strain.{{citation needed|date=December 2015}}
From the Kamfa family, these Flowerhorns are known for their massive nuchal humps, also called a kok, and their strikingly varied patterning. <ref name="craze" />


=== Kamfamalau ===
=== Kamfamalau ===
[[File:Post-19-1231048922.jpg|thumb|left|250px|Kamfamalau]]
[[File:Post-19-1231048922.jpg|thumb|Kamfamalau]]
This is a cross of a Kamfa male and a Malau female. The body and face resemble a typical Kamfa (see above). The finnage and sunken eyes reflect the Kamfa genes. The main feature of a Kamfamalau is the pearling. Fins typically take on a "frosted" pearl look that is rarely found in any other varieties of flowerhorn. Pearling usually crosses all the way across the head bump, another rarity in flowerhorn varieties. This strain should display the best characteristics of both Kamfa and Malau.<ref name="craze" />
This is a cross of a Kamfa male and a Malau female. The body and face resemble a typical Kamfa (see above).<ref name="craze" />

⚫
=== Thai Silk ===
The Thai Silk, also known as Titanium, is a relatively new strain which is almost completely metallic blue, gold, or white. Its origins are unclear. A new strain of Thai silk has been developed more square body shape like a Kamfa but their eyes can be red, yellow and white. It was believed to be a cross between White Tigers (Texas lineage), pure Texas cichlid and a Vieja.
{{clear}}


== Strains ==
== Strains ==
{{unreliable sources|section|certain=y|reason=With one exception, the only source cited (ref name="craze") is just some pseudonymous blog post.|date=December 2018}}
{{unreliable sources|section|certain=y|reason=With one exception, the only source cited (ref name="craze") is just some pseudonymous blog post.|date=December 2018}}
⚫
===Strains developed in the United States===
A strain is a more specific subset within a particular variety. Strains can get as narrowly defined as all coming from one individual parent fish. Strains can also differ by country of origin and by breeder.
⚫
New flowerhorn strains have been developed through breeding programs in the United States. Although it is hard for the US to compete with Asia's well established flowerhorn breeding farms, strains with unique genetics have been created.


⚫
== Criticism ==
=== JPG or Golden Apple ===
⚫
Flowerhorns have been criticized by cichlid hobbyists and [[environmentalism|environmentalists]] for a number of reasons. Flowerhorn breeding resulted in [[culling]] of surplus and deformed fish, some of which were dumped in the wild in Malaysia and [[Singapore]], where they survived and disrupted riverine and pond [[ecosystem]]s.<ref>{{cite web |url=http://library.thinkquest.org/04oct/01027/environmental.html |title=The Flowerhorn Fish - Fish Facts - Environmental Impacts |work=Library.Thinkquest.org |date=2005 |archive-url=https://web.archive.org/web/20090329231811/http://library.thinkquest.org/04oct/01027/environmental.html |archive-date=March 29, 2009 |url-status=dead |access-date=July 5, 2012 }}</ref><ref>{{cite web |url=http://www.iol.co.za/index.php?click_id=31&art_id=iol1045231471487W253&set_id=1 |title=Killer fish unleashed in Malaysia |work=IOL.co.za |date=February 14, 2003 |archive-url=https://web.archive.org/web/20090503231436/http://www.iol.co.za/index.php?click_id=31&art_id=iol1045231471487W253&set_id=1 |archive-date=May 3, 2009 |url-status=dead |access-date=July 5, 2012 }}</ref> Like most other cichlids, flowerhorns are aggressive and can breed quickly, competing with and eating native fish.<ref>{{cite news |url=http://www.ecologyasia.com/news-archives/2003/nov-03/straitstimes_031102_1.htm |title=Monster fish: Luohan fish-breeders' grotesque 'mistakes' are being dumped in rivers |first=Arlina |last=Arshad |work=[[The Straits Times]] |location=Singapore |date=November 2, 2003 |archive-url=https://web.archive.org/web/20101214202533/http://ecologyasia.com/news-archives/2003/nov-03/straitstimes_031102_1.htm |archive-date=December 14, 2010 |access-date=May 10, 2010 |url-status=dead }}</ref>
Created by Ah Soon of Malaysia, these fish are characterized by a large stocky body, as well as metallic pearling.<ref name="craze" />


⚫
Flowerhorn breeding<ref name="ThaiFH" /> contributes to the commercial demand for new and different fish, leading to unethical practices such as breeding for anatomical deformities, as occurred in [[goldfish]] breeding.
=== IndoMalau ===
[[File:Post-137-1207905651.jpg|thumb|right|300px|Elvis strain]]
These were created by the Indonesian Luohan Club (ILC), using a Golden Monkey (or Malau) female and a Zhen Zhu male. The second generation was spawned from the Elvis selection and a Golden Monkey female. The strain is characterized by extensive pearling all over the body, face, and head. What distinguishes an IndoMalau's pearls from that of a Zhen Zhu or a King Kamfa is that they are extremely fine. As the fish ages, the pearls become more intricately woven and thinner. Flowerlines vary dramatically; some only have a few flower spots. Most ILC IndoMalaus will include some singular flowers on the back line or "top row". The front half of the fish, from the [[pectoral fin]]s forwards, is red. The back half is a golden gradient intensifying in color towards the tail. The body is very wide and high, a throwback to the original luohan. There is a very pronounced chin or "gobbler". The head is usually forward-protruding. The tail is fan-shaped, close to that of a Kamfa. The dorsal and anal fins lack trailers, a common trait found also in Zhen Zhu. The [[caudal peduncle]] is very large and pronounced in this strain.<ref name="craze" />
[[File:Post-4-1216334880.jpg|thumb|left|250px|Tan King strain]]


⚫
Within the aquarium hobby, flowerhorns are not favored because of the difficulty of breeding them. The majority of flowerhorn males are [[Sterility (physiology)|sterile]] (cannot reproduce), so finding one that can is time consuming. Hobbyists have to wait until 8–10 months for a male fish to reach sexual maturity then pair it with a female to test fertility.<ref name="ThaiFH" />
=== Tan King ===
This strain was created by a Mr. Tan of Vietnam, by crossing a Zhen Zhu with a Kamfa. It has pearls and a flowerline like a King Kamfa, but the body and fins are more closely related to the Zhen Zhu. Most have protruding eyes and a more rounded tail like a Zhen Zhu.<ref name="craze" />


Other issues regarding flowerhorns is that of some hybrids being sold with tattoos, which some people consider unethical, as well as the use of hormones which have been used to enhance the colors of African haplochromines.<ref name=":0">{{Cite web |last=Lorenz |first=Tom |date=May 6, 2023 |title=Flower Power: Are Flowerhorns Good for the Hobby? |url=https://www.tfhmagazine.com/articles/freshwater/flower-power-are-flowerhorns-good-for-the-hobby |access-date=May 6, 2023 |website=Tropical Fish Hobbyist Magazine}}</ref>
⚫
===Strains developed in the United States===
⚫
New flowerhorn strains have been developed through breeding programs in the United States. Although it is hard for the US to compete with Asia's well established flowerhorn breeding farms, strains with unique genetics have been created.
{{Clear}}


Finally, another issue with regard to flowerhorns is the dilution of genetic lineages, since flowerhorns are hybrids and not true species.<ref name=":0" />
== Gallery of early flowerhorn strains ==


⚫
== See also ==
<gallery>
Image:Coronation_Link.png|Coronation Link
Image:Tornado Effect.jpg|Tornado Effect
Image:Perfect Harmony.jpg|Perfect Harmony
Image:Unique Track.jpg|Unique Track
Image:Absolute Wonder.jpg|Absolute Wonder
Image:Ancient Warship.jpg|Ancient Warship
Image:Creative Measure.jpg|Creative Measure
Image:Exotic Marvel.jpg|Exotic Marvel
Image:Legacy.jpg|Legacy
Image:Living Legend.jpg|Living Legend
Image:Pacific Miracle.jpg|Pacific Miracle
Image:Quantum Grace.jpg|Quantum Grace
Image:Rising Rainbow.jpg|Rising Rainbow
Image:Royal Degree.jpg|Royal Degree
Image:Scarlet Passion.jpg|Scarlet Passion
</gallery>


* [[List of animals with humps]]
⚫
== Criticism ==
⚫
Flowerhorns have been criticized by cichlid hobbyists and [[environmentalism|environmentalists]] for a number of reasons. Interest in flowerhorns resulted in [[culling]] of surplus and deformed fish, some of which were dumped in the wild in Malaysia and [[Singapore]], where they survived and disrupted riverine and pond [[ecosystem]]s.<ref>{{cite web |url=http://library.thinkquest.org/04oct/01027/environmental.html |title=The Flowerhorn Fish - Fish Facts - Environmental Impacts |work=Library.Thinkquest.org |date=2005 |archive-url=https://web.archive.org/web/20090329231811/http://library.thinkquest.org/04oct/01027/environmental.html |archive-date=March 29, 2009 |url-status=dead |access-date=July 5, 2012 }}</ref><ref>{{cite web |url=http://www.iol.co.za/index.php?click_id=31&art_id=iol1045231471487W253&set_id=1 |title=Killer fish unleashed in Malaysia |work=IOL.co.za |date=February 14, 2003 |archive-url=https://web.archive.org/web/20090503231436/http://www.iol.co.za/index.php?click_id=31&art_id=iol1045231471487W253&set_id=1 |archive-date=May 3, 2009 |url-status=dead |access-date=July 5, 2012 }}</ref> Like many other cichlids, flowerhorns are aggressive and can breed quickly, competing with and eating native fish.<ref>{{cite news |url=http://www.ecologyasia.com/news-archives/2003/nov-03/straitstimes_031102_1.htm |title=Monster fish: Luohan fish-breeders' grotesque 'mistakes' are being dumped in rivers |first=Arlina |last=Arshad |work=[[The Straits Times]] |location=Singapore |date=November 2, 2003 |archive-url=https://web.archive.org/web/20101214202533/http://ecologyasia.com/news-archives/2003/nov-03/straitstimes_031102_1.htm |archive-date=December 14, 2010 |access-date=May 10, 2010 |url-status=dead }}</ref>

⚫
Flowerhorn breeding<ref name="ThaiFH" /> contributes to the commercial demand for new and different fish, leading to unethical practices such as breeding for anatomical deformities, as occurred in goldfish breeding.

⚫
Within the aquarium hobby, flowerhorns are not favored because of the difficulty of breeding them. The majority of flowerhorn males are [[Sterility (physiology)|sterile]] (cannot reproduce), so finding one that can is time consuming. Hobbyists have to wait until 8–10 months for a male fish to reach sexual maturity then pair it with a female to test fertility.<ref name="ThaiFH" />


==References==
==References==

Latest revision as of 23:26, 20 December 2024

Golden Base type flowerhorn

Flowerhorn cichlids are ornamental aquarium fish noted for their vivid colors and the distinctively shaped heads for which they are named. Their head protuberance is formally called a nuchal hump. Like blood parrot cichlids, they are hybrids that exist in the wild only because of their release. Flowerhorns first emerged for sale on the aquarium market in Malaysia in the late 1990s and soon became popular in many countries in Asia. They are commonly kept by hobbyists in the US, Asia, and Europe. Numerous cast-off flowerhorns have been released to the wild, especially in Singapore and Malaysia, where they have become an invasive pest animal. Their importation is banned in Australia.

Origin

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Flowerhorn breeding dates to 1993.[1][self-published source?][unreliable source] Taiwanese and Malaysian peoples admired fish with protruding heads, known as 'kaloi' or 'warships', found in the western part of the nation. The slightly protruding forehead and long tail of cichlids were prized in Taiwanese society as bringing luck in geomancy. By 1994, red devil cichlids (typically Amphilophus labiatus) and trimac cichlids (A. trimaculatus) had been imported from Central America to Malaysia and the hybrid blood parrot cichlid had been imported from Taiwan to Malaysia. These fish were then bred together, marking the birth of the flowerhorn.[dubious – discuss][citation needed]

Arrival in the West

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When luohans were first imported to the US, there were only two varieties of these fish for distribution: the flowerhorn and the golden base.[1] Flowerhorns came in two varieties; those with pearls (silver-white spots on the skin), and those without.

In captivity

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There are several ways by which breeders distinguish between male and female flower horns. Generally, the males are larger than the females, but there are some exceptions. Males have the kok, or the nuchal hump, on their foreheads. Males also usually have brighter and more vivid colors. For most breeds, the females have black dots on their dorsal fins, whereas males usually have longer anal and dorsal fins.[2][self-published source?]

Flowerhorn cichlids are subject to several diseases, including hole-in-head disease, "ich", and digestive blockages.

Varieties

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General flowerhorn variety classification, containing several subsets of varieties (strains) from different countries and breeders.

The original flowerhorn hybrid stock are referred to as luohans (from the Chinese word for the Buddhist concept of arhat). The four main derived varieties are zhen zhu, golden monkey, kamfa, and the golden base group,[1] which includes faders and the golden trimac. They are sometimes referred to as breeds, though that term technically only refers to varieties of fully domesticated species.

Golden Monkey

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Golden Monkey

It can be a particularly expensive flowerhorn, carrying a price tag of more than one thousand dollars. The most expensive Golden Monkey was sold for $600,000 during a Malaysian exhibition in 2009.

Zhen Zhu

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This variety originated slightly after the Kamfa, derived from the luohan. It has a rounded tail, large mouth, red protruding eyes, and a prominent head flower.[1]

King Kamfa

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King Kamfa

From the Kamfa family, these Flowerhorns are known for their massive nuchal humps, also called a kok, and their strikingly varied patterning. [1]

Kamfamalau

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Kamfamalau

This is a cross of a Kamfa male and a Malau female. The body and face resemble a typical Kamfa (see above).[1]

Strains

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Strains developed in the United States

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New flowerhorn strains have been developed through breeding programs in the United States. Although it is hard for the US to compete with Asia's well established flowerhorn breeding farms, strains with unique genetics have been created.

Criticism

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Flowerhorns have been criticized by cichlid hobbyists and environmentalists for a number of reasons. Flowerhorn breeding resulted in culling of surplus and deformed fish, some of which were dumped in the wild in Malaysia and Singapore, where they survived and disrupted riverine and pond ecosystems.[3][4] Like most other cichlids, flowerhorns are aggressive and can breed quickly, competing with and eating native fish.[5]

Flowerhorn breeding[2] contributes to the commercial demand for new and different fish, leading to unethical practices such as breeding for anatomical deformities, as occurred in goldfish breeding.

Within the aquarium hobby, flowerhorns are not favored because of the difficulty of breeding them. The majority of flowerhorn males are sterile (cannot reproduce), so finding one that can is time consuming. Hobbyists have to wait until 8–10 months for a male fish to reach sexual maturity then pair it with a female to test fertility.[2]

Other issues regarding flowerhorns is that of some hybrids being sold with tattoos, which some people consider unethical, as well as the use of hormones which have been used to enhance the colors of African haplochromines.[6]

Finally, another issue with regard to flowerhorns is the dilution of genetic lineages, since flowerhorns are hybrids and not true species.[6]

See also

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References

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  1. ^ a b c d e f "Flowerhorn 101: A Guide to Flowerhorn Strains and Types". FlowerHornCraze.com. January 4, 2009. Archived from the original on 29 July 2009. Retrieved 9 December 2018.
  2. ^ a b c "Flowerhorn sex (louhan sex)". ThaiFH.com. May 1, 2015. Retrieved February 5, 2016.
  3. ^ "The Flowerhorn Fish - Fish Facts - Environmental Impacts". Library.Thinkquest.org. 2005. Archived from the original on March 29, 2009. Retrieved July 5, 2012.
  4. ^ "Killer fish unleashed in Malaysia". IOL.co.za. February 14, 2003. Archived from the original on May 3, 2009. Retrieved July 5, 2012.
  5. ^ Arshad, Arlina (November 2, 2003). "Monster fish: Luohan fish-breeders' grotesque 'mistakes' are being dumped in rivers". The Straits Times. Singapore. Archived from the original on December 14, 2010. Retrieved May 10, 2010.
  6. ^ a b Lorenz, Tom (May 6, 2023). "Flower Power: Are Flowerhorns Good for the Hobby?". Tropical Fish Hobbyist Magazine. Retrieved May 6, 2023.
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