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{{Short description|Species of fish}}
{{Unreferenced|date=February 2008}}
{{Speciesbox
{{Taxobox
| name = Spotted Scat
| name = Spotted scat
| status = LC
| status_system = IUCN3.1
| status_ref = <ref name="iucn status 19 November 2021">{{cite iucn |author=Collen, B. |author2=Richman, N. |author3=Beresford, A. |author4=Chenery, A. |author5=Ram, M. |collaboration=Sampled Red List Index Coordinating Team |date=2010 |title=''Scatophagus argus'' |volume=2010 |page=e.T155268A4761779 |doi=10.2305/IUCN.UK.2010-4.RLTS.T155268A4761779.en |access-date=19 November 2021}}</ref>
| image = Scatophagus argus (Wroclaw zoo)-2.JPG
| image = Scatophagus argus (Wroclaw zoo)-2.JPG
⚫
| taxon = Scatophagus argus
| image_width = 240px
⚫
| authority = ([[Carl Linnaeus|Linnaeus]], 1766)
| regnum = [[Animal]]ia
| synonyms = * ''Ephippus argus'' <small>(Linnaeus, 1766)</small>
| phylum = [[Chordate|Chordata]]
* ''Chaetodon pairatalis'' <small>[[Francis Hamilton Buchanan|Hamilton]], 1822</small>
| classis = [[Actinopterygii]]
* ''Chaetodon atromaculatus'' <small>[[Edward Turner Bennett|Bennett]], 1830</small>
| ordo = [[Perciformes]]
* ''Scatophagus bougainvillii'' <small>[[Georges Cuvier|Cuvier]], 1831</small>
| familia = [[Scatophagidae]]
| genus = ''[[Scatophagus]]''
* ''Scatophagus ornatus'' <small>Cuvier, 1831</small>
* ''Scatophagus purpurascens'' <small>Cuvier, 1831</small>
| species = '''''S. argus'''''
* ''Sargus maculatus'' [[Laurens Theodor Gronow|Gronow]], 1854
⚫
| binomial = ''Scatophagus argus''
* ''Scatophagus maculatus'' <small>(Gronow, 1854)</small>
⚫
| binomial_authority = ([[Carolus Linnaeus|Linnaeus]], 1766)
* ''Scatophagus quadratus'' <small>[[Charles Walter De Vis|De Vis]], 1882</small>
| synonyms =
* ''Scatophagus aetatevarians'' <small>De Vis, 1884</small>
''Cacodoxus argus''<br />
| synonyms_ref = <ref name = Fishbase>{{FishBase|Scatophagus|argus|month=June|year=2021}}</ref>
''Chaetodon argus''<br />
''Chaetodon atromaculatus''<br />
''Ephippus argus''<br />
''Scatophagus argus argus''<br />
''Scatophagus argus atromaculatus''
}}
}}


'''''Scatophagus argus''''' belong to the scat [[family (biology)|family]] ([[Scatophagidae]]) and occur in 2 basic color [[morph (zoology)|morph]]s which are called '''Green Scat''' and '''Ruby Scat''' or '''Red Scat'''. As a whole, the species is called '''Spotted Scat'''. This fish is generally distributed around the [[Indo-Pacific]] region, to Japan, New Guinea and Southeastern Australia. They are quite popular aquarium fish.
'''''Scatophagus argus''''', the '''spotted scat''', '''butterfish''', '''mia mia''', '''spotted butterfish''' or '''tiger scat''', is a species of fish in the scat [[family (biology)|family]] [[Scatophagidae]]. It occurs in two basic color [[morph (zoology)|morph]]s which are called '''green scat''' and '''ruby''' or '''red scat'''. This fish is generally distributed around the [[Indo-Pacific]] region, to Japan, New Guinea, and southeastern Australia. They live in coastal muddy areas, including estuaries, mangroves, harbours, and the lower courses of rivers. They are popular aquarium fish.


==Taxonomy==
These fish are kept for their looks and curious behavior, especially in body structure resembling the famous [[discus fish]]. Unlike the delicate [[freshwater]] discus [[cichlid]]s, the scats are hard fish of [[brackish]] and [[seawater]] that tolerate freshwater only when young. Otherwise they are fairly easy to keep, and they look very beautiful with black spots on their body.
''Scatophagus argus'' was first formally [[Species description|described]] in 1766 as ''Chaetodon argus'' by [[Carl Linnaeus]] with the [[Type locality (biology)|type locality]] given as India.<ref name = CofF>{{Cof genus | genus = Scatophagus | access-date = 19 August 2021}}</ref> In 1831 Georges Cuvier described the [[genus]] ''[[Scatophagus]]'' and Linnaeus's ''C. argus'' was designated as its [[type species]].<ref name = CofF2>{{Cof family | family = Scatophagidae | access-date = 19 August 2021}}</ref> The [[Specific name (zoology)|specific name]] ''argus'' refers to the mythical hundred-eyed guardian of [[Io (mythology)|Io]], [[Argus (Greek myth)|Argus]], who following his death had his eyes became the feathers of a peacock, a reference to the brown to reddish-brown spots on the body of this fish.<ref name = ETYFish>{{cite web | url = https://etyfish.org/acanthuriformes2/| title = Order Acanthuriformes (part 2): Families Ephippidae, Leiognathidae, Scatophagidae, Antigoniidae, Siganidae, Caproidae, Luvaridae, Zanclidae and Acanthuridae | work = The ETYFish Project Fish Name Etymology Database | editor1= Christopher Scharpf | editor2 = Kenneth J. Lazara | name-list-style = amp |date = 12 January 2021 | access-date = 19 August 2021 | publisher = Christopher Scharpf and Kenneth J. Lazara}}</ref>


==Description==
As a baby they live in a fresh water environment, but as they mature they move to salt water environment. Since they do not live in [[temperate]] waters, they require at least a little warmth (21C to 28C).
''Scatophagus argus'' has a body which is rectangular and strongly compressed with the head having a steep dorsal profile. It has a moderately large eye which has a diameter noticeably smaller than the length of the rounded, snout. They have a small, horizontal mouth which is not protractile. There are a number of rows of small bristle-like teeth in the jaws. The [[dorsal fin]] has 10–11 spines and 16–18 soft rays, while the [[anal fin]] has 4 spines and 13–15 soft rays.<ref name = Fishbase/> Spines and rays of the dorsal fin are separated by a deep notch and the first spine in the dorsal fin lies flat. The rear margins of soft parts of the dorsal and anal fins is roughly vertical. The [[caudal fin]] is rounded in juveniles and truncate to weakly emarginate adults.<ref name = FofA>{{cite web | url = https://fishesofaustralia.net.au/home/species/2212#summary | author1 = Gomon, M.F. | author2 = Bray, D.J. | name-list-style = amp | year = 2021 | title = ''Scatophagus argus'' | work = Fishes of Australia | access-date = 20 August 2021 | publisher = Museums Voictoria}}</ref> Small ctenoid scales cover the body. The body is greenish-brown to silvery with many brown to red-brown spots. Juveniles are a greenish-brown with either a few large, dark, rounded blotches, or five or six dark, vertical bars.<ref name = USGS>{{cite web | url = https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=945 | title = Scatophagus argus (Linnaeus, 1766) | access-date = 18 August 2021 | author = Schofield, P.J. | year = 2021 | publisher = U.S. Geological Survey | work = Nonindigenous Aquatic Species Database, Gainesville, FL}}</ref> This species attains a maximum total length of {{cvt|38|cm}}.<ref name = Fishbase/>


==Distribution and habitat==
As a young they may not require a big aquarium but they can grow big, so big aquarium with salty water is much preferred for this fish. This species is fairly peaceful if enough space is given. But sometimes they harass other species.
''Scatophagus argus'' has a wide Indo-Pacific range. It is found from the [[Persian Gulf]], along the south Asian coast into the western Pacific. It occurs as far north as Japan south to [[New South Wales]], [[New Caledonia]], and Fiji. It has also been recorded from [[French Polynesia]].<ref name="iucn status 19 November 2021" /> A small population was probably established in the [[Mediterranean Sea]] around Malta after a first report in 2007 (probably as a result of released aquarium fishes).<ref>Atlas of Exotic Fishes in the Mediterranean Sea (''Scatophagus argus''). 2nd Edition. 2021. 366p. CIESM Publishers, Paris, Monaco.https://ciesm.org/atlas/fishes_2nd_edition/Scatophagus_argus.pdf</ref><ref name = Zammit>{{cite journal | author1 = Zammit, E. | author2 = Schembri, P. J. | name-list-style = amp | year = 2011 | title = An overlooked and unexpected introduction? Occurrence of the spotted scat ''Scatophagus argus'' (Linnaeus, 1766) (Osteichthyes: Scatophagidae) in the Maltese Islands | journal = Aquatic Invasions | volume = 6 | issue = Supplement 1 | pages = S79-S83 | doi = 10.3391/ai.2011.6.S1.018| doi-access = free | url = http://pdfs.semanticscholar.org/212e/e4aeaa2c8145492c039d90a2deb41f3462f3.pdf }}</ref> This is a species of sheltered, shallow coastal waters such as estuaries, harbours, mangrove pools, and the lower parts of fresh water streams, particularly where there are high mineral concentrations. The very small juveniles float within the surface film of the water.<ref name="iucn status 19 November 2021" />


==Biology==
The Common Scat is omnivorous and an indiscriminate eater. Food includes vegetables, small animals and debris, and they usually readily take frozen and flake food. They also tend to eat aquarium plants. And due to there eating habit they are quite messy fish, requiring a strong filtration. Ironically, for older specimens water quality is actually a bigger issue the saltier the water &ndash; in the purest freshwater (as required by many rainforest fish) they will quickly succumb, tolerating hard and somewhat dirty freshwater far better. In seawater, their messy eating habits make buildup of toxic [[protein]] decay prioducts a significant issue to be controlled, if they are kept in groups as they prefer given enough space.
''Scatophagus argus'' is [[omnivorous]] and an indiscriminate eater. In 1992, biologists Barry and Fast reported adult scat from the Philippines were primarily [[herbivorous]], while the juveniles preferred zooplankton.<ref name=USGS/> Although scat were named for their purported habit of feeding on offal, the name of the genus ''Scatophagus'' means "dung eater".<ref name = ETYFish/> it may be a misnomer as this behaviour has not been confirmed in diet studies.<ref name="USGS"/> Since spotted scats can live in relatively enclosed waterbodies, as well as quite far upstream in freshwater rivers, they can adapt to varying salinities. As fry, they live in freshwater environments, but as they mature, they move to saltwater environments. They do not live in [[temperate]] waters, as they require at least a little warmth between {{cvt|21|and|28|C}}<ref>{{cite web|url=http://www.aquaticcommunity.com/mix/argus.php |title=Scatophagus argus |publisher=Aquaticcommunity.com |access-date=2014-07-13}}</ref> This species forms schools.<ref name="iucn status 19 November 2021" />


The females attain sexual maturity at around 7–9 months of age and when the weigh {{cvt|150|g}}, whereas the males are sexually mature at a smaller size. In the Philippines, [[Spawn (biology)|spawning]] is brought on by the [[monsoon]] rains that start in June and July and the increased rainfall brings cooler temperatures, increased river outflows and lower salinities. The eggs are about {{cvt|0.7|mm}} in diameter, they are transparent and have a spherical shape. The larvae take around 20 hours to hatch from fertilisation and on hatching are {{cvt|1.8|mm}} in length.<ref name = USGS/> The juveniles pass through a [[pelagic]] [[Glossary of ichthyology|tholichthys]] larval stage, like butterflyfishes.<ref name = FofA/>
⚫
''Scatophagus Argus'' is eaten by some people from its original environment, and can sting with small spikes in its anterior parts, inflicting a venom that causes pain greater than the wound size, and dizzyness. Treatment of the wound is often done by soaking the infliction in hot water.<ref>{{cite journal |author= Gisha Sivan|coauthors= K. Venketesvaran, C.K. Radhakrishnan |date=15 September 2007|title= Biological and biochemical properties of Scatophagus argus venom |journal= Toxicon |volume= 50 |issue= 4 |pages= 563–571 |publisher= Elsevier Ltd |doi= doi:10.1016/j.toxicon.2007.05.002 |accessdate= February 5, 2009}}</ref>


==Utilisation==
⚫
{{Commonscat|Scatophagus argus}}
⚫
''Scatophagus argus'' is fished for and eaten by some people from its original environment, and can sting with small spikes in its anterior parts, inflicting a venom that causes great pain and dizziness. Treatment of the wound is often done by soaking the site of invenomation in hot water.<ref>{{cite journal |author= Gisha Sivan |author2=K. Venketesvaran |author3=C.K. Radhakrishnan |date=15 September 2007|title= Biological and biochemical properties of Scatophagus argus venom |journal= Toxicon |volume= 50 |issue= 4 |pages= 563–571 |publisher= Elsevier Ltd |doi= 10.1016/j.toxicon.2007.05.002 |pmid= 17599379}}</ref> It also appears in the [[Fishkeeping|aquarium]] trade.<ref name="iucn status 19 November 2021" />

==Parasites==
[[File:Parasite180037-fig3 FIGS 6-10 Pararhadinorhynchus magnus.png|thumb|left|The [[acanthocephala]]n worm ''Pararhadinorhynchus magnus'']]
''Scatophagus argus'' harbors [[fish parasites|parasites]], like most fish. The [[acanthocephala]]n worm ''Pararhadinorhynchus magnus'' has been described from the intestine of this fish in waters off [[Vietnam]].<ref name="Van HaAmin2018">{{cite journal|last1=Van Ha|first1=Nguyen|last2=Amin|first2=Omar M.|last3=Ngo|first3=Ha Duy|last4=Heckmann|first4=Richard A.|title=Descriptions of acanthocephalans, ''Cathayacanthus spinitruncatus'' (Rhadinorhynchidae) male and ''Pararhadinorhynchus magnus'' n. sp. (Diplosentidae), from marine fish of Vietnam, with notes on ''Heterosentis holospinus'' (Arhythmacanthidae)|journal=Parasite|volume=25|year=2018|pages=35|issn=1776-1042|doi=10.1051/parasite/2018032|url= |pmc=6057740|pmid=30040609}} {{open access}}</ref>


==References==
==References==
⚫
{{Commons category|Scatophagus argus}}
{{Reflist}}
{{Reflist}}


{{Taxonbar|from=Q221035}}
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{{DEFAULTSORT:Scatophagus Argus}}
{{Authority control}}
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[[Category:Scatophagidae]]


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{{DEFAULTSORT:Scatophagus Argus}}
[[fr:Pavillon tacheté]]
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[[Category:Scatophagus|argus]]
[[nl:Argusvis]]
[[Category:Fish described in 1766]]
[[th:ปลาตะกรับ]]
[[Category:Taxa named by Carl Linnaeus]]
[[zh:金钱鱼]]

Latest revision as of 17:53, 19 November 2024

Spotted scat
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Family: Scatophagidae
Genus: Scatophagus
Species:
S. argus
Binomial name
Scatophagus argus
(Linnaeus, 1766)
Synonyms[2]
  • Ephippus argus (Linnaeus, 1766)
  • Chaetodon pairatalis Hamilton, 1822
  • Chaetodon atromaculatus Bennett, 1830
  • Scatophagus bougainvillii Cuvier, 1831
  • Scatophagus ornatus Cuvier, 1831
  • Scatophagus purpurascens Cuvier, 1831
  • Sargus maculatus Gronow, 1854
  • Scatophagus maculatus (Gronow, 1854)
  • Scatophagus quadratus De Vis, 1882
  • Scatophagus aetatevarians De Vis, 1884

Scatophagus argus, the spotted scat, butterfish, mia mia, spotted butterfish or tiger scat, is a species of fish in the scat family Scatophagidae. It occurs in two basic color morphs which are called green scat and ruby or red scat. This fish is generally distributed around the Indo-Pacific region, to Japan, New Guinea, and southeastern Australia. They live in coastal muddy areas, including estuaries, mangroves, harbours, and the lower courses of rivers. They are popular aquarium fish.

Taxonomy

[edit]

Scatophagus argus was first formally described in 1766 as Chaetodon argus by Carl Linnaeus with the type locality given as India.[3] In 1831 Georges Cuvier described the genus Scatophagus and Linnaeus's C. argus was designated as its type species.[4] The specific name argus refers to the mythical hundred-eyed guardian of Io, Argus, who following his death had his eyes became the feathers of a peacock, a reference to the brown to reddish-brown spots on the body of this fish.[5]

Description

[edit]

Scatophagus argus has a body which is rectangular and strongly compressed with the head having a steep dorsal profile. It has a moderately large eye which has a diameter noticeably smaller than the length of the rounded, snout. They have a small, horizontal mouth which is not protractile. There are a number of rows of small bristle-like teeth in the jaws. The dorsal fin has 10–11 spines and 16–18 soft rays, while the anal fin has 4 spines and 13–15 soft rays.[2] Spines and rays of the dorsal fin are separated by a deep notch and the first spine in the dorsal fin lies flat. The rear margins of soft parts of the dorsal and anal fins is roughly vertical. The caudal fin is rounded in juveniles and truncate to weakly emarginate adults.[6] Small ctenoid scales cover the body. The body is greenish-brown to silvery with many brown to red-brown spots. Juveniles are a greenish-brown with either a few large, dark, rounded blotches, or five or six dark, vertical bars.[7] This species attains a maximum total length of 38 cm (15 in).[2]

Distribution and habitat

[edit]

Scatophagus argus has a wide Indo-Pacific range. It is found from the Persian Gulf, along the south Asian coast into the western Pacific. It occurs as far north as Japan south to New South Wales, New Caledonia, and Fiji. It has also been recorded from French Polynesia.[1] A small population was probably established in the Mediterranean Sea around Malta after a first report in 2007 (probably as a result of released aquarium fishes).[8][9] This is a species of sheltered, shallow coastal waters such as estuaries, harbours, mangrove pools, and the lower parts of fresh water streams, particularly where there are high mineral concentrations. The very small juveniles float within the surface film of the water.[1]

Biology

[edit]

Scatophagus argus is omnivorous and an indiscriminate eater. In 1992, biologists Barry and Fast reported adult scat from the Philippines were primarily herbivorous, while the juveniles preferred zooplankton.[7] Although scat were named for their purported habit of feeding on offal, the name of the genus Scatophagus means "dung eater".[5] it may be a misnomer as this behaviour has not been confirmed in diet studies.[7] Since spotted scats can live in relatively enclosed waterbodies, as well as quite far upstream in freshwater rivers, they can adapt to varying salinities. As fry, they live in freshwater environments, but as they mature, they move to saltwater environments. They do not live in temperate waters, as they require at least a little warmth between 21 and 28 °C (70 and 82 °F)[10] This species forms schools.[1]

The females attain sexual maturity at around 7–9 months of age and when the weigh 150 g (5.3 oz), whereas the males are sexually mature at a smaller size. In the Philippines, spawning is brought on by the monsoon rains that start in June and July and the increased rainfall brings cooler temperatures, increased river outflows and lower salinities. The eggs are about 0.7 mm (0.028 in) in diameter, they are transparent and have a spherical shape. The larvae take around 20 hours to hatch from fertilisation and on hatching are 1.8 mm (0.071 in) in length.[7] The juveniles pass through a pelagic tholichthys larval stage, like butterflyfishes.[6]

Utilisation

[edit]

Scatophagus argus is fished for and eaten by some people from its original environment, and can sting with small spikes in its anterior parts, inflicting a venom that causes great pain and dizziness. Treatment of the wound is often done by soaking the site of invenomation in hot water.[11] It also appears in the aquarium trade.[1]

Parasites

[edit]
The acanthocephalan worm Pararhadinorhynchus magnus

Scatophagus argus harbors parasites, like most fish. The acanthocephalan worm Pararhadinorhynchus magnus has been described from the intestine of this fish in waters off Vietnam.[12]

References

[edit]
Wikimedia Commons has media related to Scatophagus argus.
  1. ^ a b c d e Collen, B.; Richman, N.; Beresford, A.; Chenery, A.; Ram, M.; et al. (Sampled Red List Index Coordinating Team) (2010). "Scatophagus argus". IUCN Red List of Threatened Species. 2010: e.T155268A4761779. doi:10.2305/IUCN.UK.2010-4.RLTS.T155268A4761779.en. Retrieved 19 November 2021.
  2. ^ a b c Froese, Rainer; Pauly, Daniel (eds.). "Scatophagus argus". FishBase. June 2021 version.
  3. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Scatophagus". Catalog of Fishes. California Academy of Sciences. Retrieved 19 August 2021.
  4. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Scatophagidae". Catalog of Fishes. California Academy of Sciences. Retrieved 19 August 2021.
  5. ^ a b Christopher Scharpf & Kenneth J. Lazara, eds. (12 January 2021). "Order Acanthuriformes (part 2): Families Ephippidae, Leiognathidae, Scatophagidae, Antigoniidae, Siganidae, Caproidae, Luvaridae, Zanclidae and Acanthuridae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 19 August 2021.
  6. ^ a b Gomon, M.F. & Bray, D.J. (2021). "Scatophagus argus". Fishes of Australia. Museums Voictoria. Retrieved 20 August 2021.
  7. ^ a b c d Schofield, P.J. (2021). "Scatophagus argus (Linnaeus, 1766)". Nonindigenous Aquatic Species Database, Gainesville, FL. U.S. Geological Survey. Retrieved 18 August 2021.
  8. ^ Atlas of Exotic Fishes in the Mediterranean Sea (Scatophagus argus). 2nd Edition. 2021. 366p. CIESM Publishers, Paris, Monaco.https://ciesm.org/atlas/fishes_2nd_edition/Scatophagus_argus.pdf
  9. ^ Zammit, E. & Schembri, P. J. (2011). "An overlooked and unexpected introduction? Occurrence of the spotted scat Scatophagus argus (Linnaeus, 1766) (Osteichthyes: Scatophagidae) in the Maltese Islands" (PDF). Aquatic Invasions. 6 (Supplement 1): S79–S83. doi:10.3391/ai.2011.6.S1.018.
  10. ^ "Scatophagus argus". Aquaticcommunity.com. Retrieved 2014-07-13.
  11. ^ Gisha Sivan; K. Venketesvaran; C.K. Radhakrishnan (15 September 2007). "Biological and biochemical properties of Scatophagus argus venom". Toxicon. 50 (4). Elsevier Ltd: 563–571. doi:10.1016/j.toxicon.2007.05.002. PMID 17599379.
  12. ^ Van Ha, Nguyen; Amin, Omar M.; Ngo, Ha Duy; Heckmann, Richard A. (2018). "Descriptions of acanthocephalans, Cathayacanthus spinitruncatus (Rhadinorhynchidae) male and Pararhadinorhynchus magnus n. sp. (Diplosentidae), from marine fish of Vietnam, with notes on Heterosentis holospinus (Arhythmacanthidae)". Parasite. 25: 35. doi:10.1051/parasite/2018032. ISSN 1776-1042. PMC 6057740. PMID 30040609. Open access icon
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