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==Description==
==Description==
[[File:Queen Angelfish Crown symbol.jpg|thumb|upright|right|Frontal view of a queen angelfish with "crown" visible|alt=Frontal view of a queen angelfish showing the crown]]
[[File:Queen Angelfish Crown symbol.jpg|thumb|upright|right|Frontal view of a queen angelfish with "crown" visible|alt=Frontal view of a queen angelfish showing the crown]]
The queen angelfish has a broad, flattened, oval-shaped body with a reduced, blunted [[snout]] and a small mouth containing bristle-like teeth.<ref name = STRI>{{cite web|url=https://biogeodb.stri.si.edu/caribbean/en/thefishes/species/3853|title=Species: Holacanthus ciliaris, Blue angelfish|access-date=22 February 2021|work=Shorefishes of the Greater Caribbean online information|publisher=Smithsonian Tropical Research Institute}}</ref> The [[dorsal fin]] contains 14 [[spine (zoology)|spines]] and 19–21 soft [[Fish fin#Ray-fins|rays]], and the [[Fish fin#AnchAnal|anal fin]] has 3 spines and 20–21 soft rays.<ref name = Fishbase/> This species attains a maximum [[Fish measurement|total length]] of {{convert|45|cm|in|abbr=on}} and weight of {{convert|1600|g|abbr=on}}.<ref name = Fishbase/><ref name = DF/> Males [[sexual dimorphism|may be larger]] than females.<ref name="Snyder"/><ref name="Moyer1983"/>
The queen angelfish has a broad, flattened, oval-shaped body with a reduced, dulled [[snout]] and a small mouth containing bristle-like teeth.<ref name = STRI>{{cite web|url=https://biogeodb.stri.si.edu/caribbean/en/thefishes/species/3853|title=Species: Holacanthus ciliaris, Blue angelfish|access-date=22 February 2021|work=Shorefishes of the Greater Caribbean online information|publisher=Smithsonian Tropical Research Institute}}</ref> The [[dorsal fin]] contains 14 [[spine (zoology)|spines]] and 19–21 soft [[Fish fin#Ray-fins|rays]], and the [[Fish fin#AnchAnal|anal fin]] has 3 spines and 20–21 soft rays.<ref name = Fishbase/> This species attains a maximum [[Fish measurement|total length]] of {{convert|45|cm|in|abbr=on}} and weight of {{convert|1600|g|abbr=on}}.<ref name = Fishbase/><ref name = DF/> Males [[sexual dimorphism|may be larger]] than females.<ref name="Snyder"/><ref name="Moyer1983"/>


The species is covered in blue-green scales tipped with yellow, with a bright yellow tail, [[Fish fin#AnchPectoral|pectoral]] and [[pelvic fin]]s. Both the dorsal and anal fins have orange-yellow end points.<ref name="Snyder">{{cite book|last1=Snyder|first1=David B.|last2=Burgess|first2=George H.|year=2016|title=Marine Fishes of Florida|publisher=Johns Hopkins University Press|pages=221–224|isbn=978-1421418728}}</ref> On the forehead is an eye-like spot or "crown" that is [[cobalt blue]] with an [[electric blue (color)|electric blue]] outer ring and dotted with electric blue spots.<ref name = Fishbase/><ref name = DF/><ref name="Snyder"/> This crown is the main feature distinguishing the species from the Bermuda blue angelfish.<ref name = DF/> A similar spot exists near each pectoral fin.<ref name="Snyder"/> Juveniles are dark blue with bright blue vertical stripes and a yellow pectoral area. They resemble juvenile blue angelfish and are distinguished by more curved vertical stripes.<ref name = DF/> Growing juveniles develop transitional patterns as they reach their adult coloration.<ref name="Snyder"/>
The species is covered in blue-green scales tipped with yellow, with a bright yellow tail, [[Fish fin#AnchPectoral|pectoral]] and [[pelvic fin]]s. Both the dorsal and anal fins have orange-yellow end points.<ref name="Snyder">{{cite book|last1=Snyder|first1=David B.|last2=Burgess|first2=George H.|year=2016|title=Marine Fishes of Florida|publisher=Johns Hopkins University Press|pages=221–224|isbn=978-1421418728}}</ref> On the forehead is an eye-like spot or "crown" that is [[cobalt blue]] with an [[electric blue (color)|electric blue]] outer ring and dotted with electric blue spots.<ref name = Fishbase/><ref name = DF/><ref name="Snyder"/> This crown is the main feature distinguishing the species from the Bermuda blue angelfish.<ref name = DF/> A similar spot exists near each pectoral fin.<ref name="Snyder"/> Juveniles are dark blue with bright blue vertical stripes and a yellow pectoral area. They resemble juvenile blue angelfish and are distinguished by more curved vertical stripes.<ref name = DF/> Growing juveniles develop transitional patterns as they reach their adult coloration.<ref name="Snyder"/>

Revision as of 15:06, 17 June 2022

Queen angelfish
Adult queen angelfish
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Family: Pomacanthidae
Genus: Holacanthus
Species:
H. ciliaris
Binomial name
Holacanthus ciliaris
Range of the queen angelfish
Synonyms[2]
  • Chaetodon ciliaris Linnaeus, 1758
  • Angelichthys ciliaris (Linnaeus, 1758)
  • Chaetodon squamulosus Shaw, 1796
  • Chaetodon parrae Bloch & Schneider, 1801
  • Holacanthus coronatus Desmarest, 1823
  • Holacanthus formosus Castelnau, 1855
  • Holacanthus iodocus Jordan & Rutter, 1897
  • Angelichthys iodocus (Jordan & Rutter, 1897)
  • Holacanthus lunatus Blosser, 1909

The queen angelfish (Holacanthus ciliaris), also known as the blue angelfish, golden angelfish, or yellow angelfish, is a species of marine angelfish found in the western Atlantic Ocean. It is a benthic (ocean floor) warm-water species that lives in coral reefs. It is recognized by its blue and yellow coloration and a distinctive spot or "crown" on its forehead. This crown distinguishes it from the closely related and similar-looking Bermuda blue angelfish (Holacanthus bermudensis), with which it overlaps in range and can interbreed.

Adult queen angelfish are selective feeders and primarily eat sponges. Their social structure consists of harems which include one male and up to four females. They live within a territory where the females forage separately and are tended to by the male. Breeding in the species occurs near a full moon. The transparent eggs are float in the water until they hatch. Juveniles of the species have different coloration than adults and act as cleaner fish.

The queen angelfish is popular in the aquarium trade and has been a particularly common exported species from Brazil. In 2010, the queen angelfish was assessed as least concern by the International Union for Conservation of Nature as the wild population appeared to be stable.

Taxonomy

The queen angelfish was first described as Chaetodon ciliaris in 1758 by Carl Linnaeus in the 10th edition of his Systema Naturae, with the type locality given as the "Western Atlantic/Caribbean".[3] In 1802 it was moved by French naturalist Bernard Germain de Lacépède to the genus Holacanthus,[4] the name of which is derived from the Ancient Greek words "holos" (full) and "akantha" (thorn).[2] Its specific name ciliaris means "fringed", a reference to its squamis ciliatis ("ciliate scales").[5] Other common names for the species include "blue angelfish", "golden angelfish" and "yellow angelfish".[6]

Marine angelfish of the genus Holacanthus likely originated between 10.2 and 7.6 million years ago (mya). The most basal species is the Guinean angelfish (Holacanthus africanus) off the coast of West Africa, indicating that the lineage colonized the Atlantic from the Indian Ocean.[7] The closure of the Isthmus of Panama 3.5–3.1 mya led to the splitting off of the Tropical Eastern Pacific species.[8] The closest relative and sister species of the queen angelfish is the sympatric and similar Bermuda blue angelfish (H. bermudensis), from which it split around 1.5 mya.[7][8] They are known to interbreed, producing a hybrid known as the Townsend angelfish[9] which has features intermediate between the parent species.[10] The Townsend angelfish is fertile, and individuals can breed both with each other and with the two parent species.[11]

The following cladogram is based on molecular evidence:[7][8][12]

Image of a fish in a coral reef
Townsend angelfish, a hybrid of queen and Bermuda blue angelfish
Holacanthus

Description

Frontal view of a queen angelfish showing the crown
Frontal view of a queen angelfish with "crown" visible

The queen angelfish has a broad, flattened, oval-shaped body with a reduced, dulled snout and a small mouth containing bristle-like teeth.[13] The dorsal fin contains 14 spines and 19–21 soft rays, and the anal fin has 3 spines and 20–21 soft rays.[2] This species attains a maximum total length of 45 cm (18 in) and weight of 1,600 g (56 oz).[2][6] Males may be larger than females.[14][15]

The species is covered in blue-green scales tipped with yellow, with a bright yellow tail, pectoral and pelvic fins. Both the dorsal and anal fins have orange-yellow end points.[14] On the forehead is an eye-like spot or "crown" that is cobalt blue with an electric blue outer ring and dotted with electric blue spots.[2][6][14] This crown is the main feature distinguishing the species from the Bermuda blue angelfish.[6] A similar spot exists near each pectoral fin.[14] Juveniles are dark blue with bright blue vertical stripes and a yellow pectoral area. They resemble juvenile blue angelfish and are distinguished by more curved vertical stripes.[6] Growing juveniles develop transitional patterns as they reach their adult coloration.[14]

Image of a juvenile angelfish
Juvenile angelfish closer to adult coloration

Seven other color morphs have been recorded off the coast of the Saint Peter and Saint Paul Archipelago, Brazil. These include a bright-orange gold morph, an all-white morph, a white morph with orange and black blotches, a bright blue morph that has a pale caudal fin, a yellow-faced bright blue morph with a pale caudal fin, a bright blue morph with both the pectorals and caudal fin yellow, and a bright blue morph with black-and-white pectoral/caudal fins and white mouth and operculum.[16] Another color morph was recorded off Dry Tortugas, Florida, in 2009. This fish was mostly cobalt blue with white pectoral, pelvic, and caudal fins. The snout and operculum area had mottled cobalt blue and white coloration, and the dorsal and anal fins were deep yellow-orange and white.[17]

There are records of at least two wild queen angelfish at St. Peter and St. Paul with a "pughead" skeletal deformity, a compressed upper jaw and a protruded lower jaw. Such abnormalities are more common in captive fish.[18]

Ecology

Angelfish among corals
Angelfish at John Pennekamp Coral Reef State Park, Key Largo, Florida

Queen angelfish are found in tropical and subtropical areas of the Western Atlantic Ocean around the coasts and islands of the Americas. They occur from Florida along the Gulf of Mexico and the Caribbean Sea down to Brazil. Their range extends as far east as Bermuda and the Saint Peter and Saint Paul Archipelago.[1][6] Queen angelfish are benthic or bottom-dwelling and occur from shallow waters close to shore down to 70 m (230 ft). They live in coral reefs and are typically encountered either as solitary fish or as pairs, swimming among soft corals.[6]

Queen angelfish eat sponges, tunicates, jellyfish, corals, plankton, and algae. Juveniles act as cleaner fish and establish and remove ectoparasites from bigger fish.[6] Off St. Thomas Island and Salvador, Bahia, 90% of the diet of adults is sponges. Off the Saint Peter and Saint Paul Archipelago, more than 30 prey species may be consumed, 68% being sponges, 25% being algae, and 5% being bryozoans. Queen angelfish appear to be selective feeders as the proportion of prey in their diet does not correlate with their abundance. On the species level, the angelfish of the Saint Peter and Saint Paul Archipelago prefer the less common sponges Geodia neptuni, Erylus latens, Clathria calla, and Asteropus niger.[19]

Life cycle

Picture of two angelfish, one turning away from the camera
A pair of angelfish off Belize

Male queen angelfish have large territories with a harem of two to four females.[15] Little is known about the sexual development of the species, though they are presumed to be protogynous hermaphrodites. The largest harem female may transform into a male if the territorial male disappears.[11] Around midday, the females forage individually in different locations. The male tends to each of them, rushing at, circling, and feeding next to them.[15] Spawning in this species occurs year-round.[20] It is observed sometime around a full moon.[15]

Courtship involves the male showing his side to the female and flick his pectoral fins at her or "soaring" above them. At the beginning of spawning, the female swims towards the surface with the male swimming under her with his snout pressing against her vent.[15] They then deposit their eggs and semen into the water. The female discharges between 25 and 75 thousand eggs a day.[6] After spawning, the pair split and head to back to the ocean floor.[11]

The transparent eggs are pelagic and remain suspended in the water for 15–20 hours. The hatched larvae have a large yolk sac with no functional eyes, gut or fins, but two days later, the yolk is absorbed, and the larvae have more of a resemblance to fish. These larvae are plankton-eaters and grow quickly. Between the ages of three and four weeks old, when they have reached a length of 15 to 20 mm (0.6 to 0.8 in), they descend to the floor as juveniles. Juvenile angelfish live alone and in territories encompassing finger sponges and coral, where they establish cleaning stations for other fish.[6]

Human interactions

Angelfish in aquarium
Angelfish at aquarium in Barcelona, Spain

Queen angelfish are not normally eaten nor are they commercially fished. They are captured mostly for the aquarium trade, where they are highly valued.[21] As juveniles, angelfish can be conditioned to accept typical aquarium food and hence have a higher survival rate than individuals taken as adults, which would require a more specialized diet.[22]

The queen angelfish has been a commonly exported angelfish species from Brazil.[1] From 1995 to 2000, 43,730 fish were traded at Fortaleza in the northeast of the country, and in 1995, the queen and French angelfish were nearly 75% of marine ornamental fish sold.[23] In 2010, the queen angelfish was assessed as least concern by the International Union for Conservation of Nature, as the species is not fished much in its range (aside from Brazil) and the wild population appeared to be stable.[1]

Queen angelfish have been caught in the eastern Adriatic Sea, off Croatia, in 2011, and the Mediterranean Sea, off Malta, in 2020. These are likely introductions from the aquarium industry and not natural colonizations.[24] In 2015, an aquarium-introduced angelfish was caught in the Red Sea at Eilat's Coral Beach, Israel. The disease-causing bacterium Photobacterium damselae piscicida, which was not previously documented in Red Sea fish, was isolated from its kidney, raising concerns that it could infect native fish.[25]

References

  1. ^ a b c d Pyle, R.; Myers, R. F.; Rocha, L. A.; Craig, M. T. (2010). "Holacanthus ciliaris". IUCN Red List of Threatened Species. 2010: e.T165883A6156566. doi:10.2305/IUCN.UK.2010-4.RLTS.T165883A6156566.en. Retrieved 19 November 2021.
  2. ^ a b c d e Froese, Rainer (December 2019). "Holacanthus ciliaris (Linnaeus, 1758)". Fishbase. Retrieved 21 February 2021.
  3. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Holacanthus". Catalog of Fishes. California Academy of Sciences. Retrieved 21 February 2021.
  4. ^ "Holacanthus Lacepède, 1802". World Register of Marine Species. Retrieved 24 November 2021.
  5. ^ Scharpf, Christopher; Lazara, Kenneth J. (21 July 2020). "Order Acanthuriformes (Part 1): Families Lobotidae, Pomacanthidae, Drepaneidae and Chaetodontidae". The ETYFish Project Fish Name Etymology Database. Retrieved 22 February 2021.
  6. ^ a b c d e f g h i j "Holacanthus ciliaris". Discover Fish. Florida Museum. 10 May 2017. Retrieved 22 February 2021.
  7. ^ a b c Alva-Campbell, Y.; Floeter, S. R.; Robertson, D. R.; Bellwood, D. R.; Bernardi, G. (2010). "Molecular phylogenetics and evolution of Holacanthus angelfishes (Pomacanthidae)". Molecular Phylogenetics and Evolution. 56 (1): 456–461. doi:10.1016/j.ympev.2010.02.014. PMID 20171293.
  8. ^ a b c Tariel, J.; Longo, G. C.; Bernardi, G. (2016). "Tempo and mode of speciation in Holacanthus angelfishes based on RADseq markers". Molecular Phylogenetics and Evolution. 98: 84–88. doi:10.1016/j.ympev.2016.01.010. PMID 26876637.
  9. ^ Reyes-Bonilla, H.; Alvarez-Filip, F.; Sánchez-Alcántara, I. (2010). "New records of the Townsend angelfish (Holacanthus bermudensis X H. ciliaris hybrid) and range extension of the Blue angelfish (H. bermudensis) in the Caribbean Sea". Caribbean Journal of Science. 46 (2–3): 339–345. doi:10.18475/cjos.v46i2.a24. S2CID 130966144.
  10. ^ Feddern, H. (1968). "Hybridization between the western Atlantic angelfishes, Holacanthus isabelita and H. ciliaris" (PDF). Bulletin of Marine Science. 18 (2): 351–382.
  11. ^ a b c Deloach, Ned; Deloach, Anne (2019). Reef Fish Behavior: Florida, Caribbean, Bahamas (2nd ed.). New World Publications. pp. 175–176, 180–181. ISBN 978-1878348685.
  12. ^ Shen, K-N; Chang, C-W; Chen, C-H; Hsiao, C-D (2015). "Complete mitogenomes of King angelfish (Holacanthus passer) and Queen angelfish (Holacanthus ciliaris) (Teleostei: Pomacanthidae)". Mitochondrial DNA Part A. 27 (4): 2815–2816. doi:10.3109/19401736.2015.1053081. PMID 26119118. S2CID 207745744.
  13. ^ "Species: Holacanthus ciliaris, Blue angelfish". Shorefishes of the Greater Caribbean online information. Smithsonian Tropical Research Institute. Retrieved 22 February 2021.
  14. ^ a b c d e Snyder, David B.; Burgess, George H. (2016). Marine Fishes of Florida. Johns Hopkins University Press. pp. 221–224. ISBN 978-1421418728.
  15. ^ a b c d e Moyer, J. T.; Thresher, R. E.; Colin, P. L. (1983). "Courtship, spawning and inferred social organization of American angelfishes (Genera Pornacanthus, Holacanthus and Centropyge; Pomacanthidae)". Environmental Biology of Fishes. 9 (1): 25–39. doi:10.1007/BF00001056. S2CID 25999869.
  16. ^ Luiz, O. J. Jr (2003). "Colour Morphs in a Queen Angelfish Holacanthus ciliaris (Perciformes: Pomacanthidae) population of St. Paul's Rocks, NE Brazil". Tropical Fish Hobbyist. 51 (5): 81–90.
  17. ^ Feeley, M.; Luiz, O. J. Jr; Zurcher, N. (2009). "Colour morph of a probable queen angelfish Holacanthus ciliaris from Dry Tortugas, Florida". Journal of Fish Biology. 74 (10): 2415–2421. doi:10.1111/j.1095-8649.2009.02259.x. PMID 20735563.
  18. ^ Francini-Filho, R. B.; Amado-Filho, G. M. (2012). "First record of pughead skeletal deformity in the queen angelfish Holacanthus ciliaris (St. Peter and St. Paul Archipelago, Mid Atlantic Ridge, Brazil)". Coral Reefs. 32 (211): 211. doi:10.1007/s00338-012-0975-z. S2CID 43730987.
  19. ^ Reis, F.; Moraes, F.; Batista, D.; Villaça, R.; Aguiar, A.; Muricy, G. (2013). "Diet of the queen angelfish Holacanthus ciliaris (Pomacanthidae) in São Pedro e São Paulo Archipelago, Brazil". Journal of the Marine Biological Association of the United Kingdom. 93 (2): 453–460. doi:10.1017/S0025315412001099. S2CID 87827468.
  20. ^ Nottingham, Mara C.; Feitosa Silva, José Roberto; de Araújo, Maria Elisabeth (2003). "Morphology and Histology of the Testicles of Queen Angelfish Holacanthus ciliaris (Linnaeus, 1758) (Teleostei: Perciformes: Pomacanthidae)". Arquivos de Ciências do Mar. 36 (1–2): 89–94. doi:10.32360/acmar.v36i1-2.6602 (inactive 28 February 2022).{{cite journal}}: CS1 maint: DOI inactive as of February 2022 (link)
  21. ^ Larkin, S. L.; de Bodisco, C.; Degner, R. L. (2008). "Wholesale and Retail Break-Even Prices for MAC-Certified Queen Angelfish (Holacanthus ciliaris)". In Cato, J. C.; Brown, C. L. (eds.). Marine Ornamental Species: Collection, Culture & Conservation. Wiley-Blackwell. p. 126. ISBN 978-0813829876.
  22. ^ Spotte, S. (1993). Marine Aquarium Keeping. Wiley. p. 87. ISBN 9780471594895.
  23. ^ Monteiro-Neto, C.; Cunha, F. E. A.; Nottingham, M. C.; Araújo, M. E.; Rosa, I. L.; Barros, G. M. L. (2003). "Analysis of the marine ornamental fish trade at Ceará State, northeast Brazil". Biodiversity and Conservation. 12 (6): 1287–1295. CiteSeerX 10.1.1.610.6568. doi:10.1023/A:1023096023733. S2CID 19814034.
  24. ^ Deidun, A.; Galdies, J.; Zava, B. (2020). "A bonanza of angelfish (Perciformes: Pomacanthidae) in the Mediterranean: the second documented record of Holacanthus ciliaris (Linnaeus, 1758)". BioInvasions Records. 9 (4): 827–833. doi:10.3391/bir.2020.9.4.16. S2CID 229615030.
  25. ^ Stern, N.; Rachmilovitz, E. N.; Sharon, G.; Diamant, A. (2016). "The dire implications of releasing marine ornamental fishes into the wild: first reported case from the Red Sea". Marine Biodiversity. 48 (3): 1615–1620. doi:10.1007/s12526-016-0600-4. S2CID 14359958.
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