Queen angelfish

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Queen angelfish
Queen Angelfish.jpg
Adult queen angelfish
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Pomacanthidae
Genus: Holacanthus
Species:
H. ciliaris
Binomial name
Holacanthus ciliaris
QueenAngelfish distribution.png
Range of the queen angelfish
Synonyms [2]
  • Chaetodon ciliarisLinnaeus, 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.

Contents

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 pelagic and float in the water, hatching after 15–20 hours. 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]

Townsend angelfish, a hybrid of queen and Bermuda blue angelfish Townsend Angelfish hybrid.jpg
Townsend angelfish, a hybrid of queen and Bermuda blue angelfish
Holacanthus

Rock beauty Holacanthus tricolor 1 (cropped).jpg

Bermuda blue angelfish Bermuda blue angelfish (cropped).jpg

Queen angelfish Holacanthus ciliaris 10 (cropped).jpg

Clarion angelfish Clarion angelfish (Holacanthus clarionensis) (19185438555) (cropped).jpg

Clipperton angelfish Holacanthus limbaughi.jpg

King angelfish Holacanthus passer 1.jpg

Guinean angelfish Holacanthus africanus.jpg

Description

Frontal view of a queen angelfish with "crown" visible Queen Angelfish Crown symbol.jpg
Frontal view of a queen angelfish with "crown" visible

The queen angelfish has a deep, compressed oval-shaped body with a short, blunt 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 has blue-green flank (side) scales with yellow edges; the tail and paired fins are bright yellow, and the anal fins are orange-yellow. The back of the dorsal fin is tipped in orange-yellow, and the pectoral fins have large blue spots at the base. [14] On the forehead, above and behind the eyes, is an ocellated (eye-like) spot or "crown" with an electric blue ring surrounding a cobalt blue center with electric blue spots. [2] [14] This crown is the main feature distinguishing the species from the Bermuda blue angelfish. [6] [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]

Juvenile angelfish closer to adult coloration Juvenile Queen Angelfish.jpg
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 at John Pennekamp Coral Reef State Park, Key Largo, Florida Queen angelfish at their habitat.jpg
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 feed on sponges, tunicates, jellyfish, corals, plankton, and algae. Juveniles act as cleaner fish and set up cleaning stations where they pick ectoparasites off 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

A pair of angelfish off Belize Belize 2016 - yP2010013 batch.jpg
A pair of angelfish off Belize

Queen angelfish live in harems consisting of one male and two to four females within a large territory. [15] Little is known about the sexual development of the species, though they are presumed to be protogynous hermaphrodites. If a harem male disappears, the largest female may change sex. [11] Around midday, the females forage separately 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 displaying his side to the female and slightly flicking his pectoral fins outwardly at intervals lasting a few seconds. At the beginning of spawning, the female ascends towards the surface as the male swims below her with his snout touching her vent. [15] They then release their eggs and semen into the water. The female can discharge between 25 and 75 thousand eggs in an evening. [6] After spawning, the pair separate and head for the bottom, where the female may nip and chase the male. [11]

The transparent eggs are pelagic and float in the water, hatching after 15–20 hours. The initial larvae have a large yolk sac and lack functional eyes, gut or fins, but after 48 hours, the yolk is absorbed, and the larvae have more of a resemblance to fish. These larvae feed on plankton and grow rapidly. Between three and four weeks after hatching, when they have reached a length of 15 to 20 mm (0.6 to 0.8 in), they settle on the floor as juveniles. They live alone and in territories in and around finger sponges and coral. Within these territories, juveniles establish cleaning stations for other fish. [6]

Human interactions

Angelfish at aquarium in Barcelona, Spain Queen Angelfish 14-05-2009 15-24-48.JPG
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]

Related Research Articles

Pomacanthidae Family of fishes

Marine angelfish are perciform fish of the family Pomacanthidae. They are found on shallow reefs in the tropical Atlantic, Indian, and mostly western Pacific Oceans. The family contains seven genera and about 86 species. They should not be confused with the freshwater angelfish, tropical cichlids of the Amazon Basin.

French angelfish Species of fish

The French angelfish is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It occurs in the Western Atlantic Ocean.

Bluering angelfish Species of fish

The bluering angelfish, also known as the Annularis Angelfish and the Blue King Angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is member of the genus Pomacanthus, composed of large marine angelfish.

<i>Holacanthus bermudensis</i> Species of fish

Holacanthus bermudensis, the blue angelfish or Bermuda blue angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It occurs in the western Atlantic Ocean.

Royal angelfish Species of fish

The royal angelfish, or regal angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae, and the monotypic genus Pygoplites. It is found in tropical Indo-Pacific oceans. It can grow as long as 25 cm.

Rock beauty Species of fish

The rock beauty, also known as corn sugar, coshubba, rock beasty, catalineta, and yellow nanny, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the western Atlantic Ocean.

Sixbar angelfish Species of fish

The sixbar angelfish, also known as the six banded angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in Indo-Pacific region.

<i>Holacanthus passer</i> Species of fish

Holacanthus passer is a large marine angelfish of the family Pomacanthidae. Its large size and bright colors make it a popular aquarium fish, even though it can be difficult to keep.

<i>Pomacanthus asfur</i> Species of fish

Pomacanthus asfur, the Arabian angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the Western Indian Ocean.

<i>Pomacanthus maculosus</i> Species of fish

Pomacanthus maculosus, the yellowbar angelfish, half-moon angelfish, yellow-marked angelfish, yellowband angelfish or yellow-blotched angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the western Indian Ocean and, more recently, in the eastern Mediterranean Sea.

<i>Pomacanthus zonipectus</i> Species of fish

Pomacanthus zonipectus, the Cortez angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is from the Eastern Pacific. It occasionally makes its way into the aquarium trade.

<i>Pomacanthus semicirculatus</i> Species of fish

Pomacanthus semicirculatus, the semicircled angelfish, Koran angelfish, blue angelfish, zebra angelfish or half-circled angelfish, is a species of marine ray-finned fish, a marine angelfish, belonging to the family Pomacanthidae. It is found in the Indo-West Pacific Ocean. It occasionally makes its way into the aquarium trade.

<i>Chaetodontoplus meridithii</i> Species of fish

Chaetodontoplus meridithii, the Queensland yellowtail angelfish, Meredith's angelfish or yellow-finned angelfish, yellowtail angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found off eastern Australia.

<i>Apolemichthys xanthurus</i> Species of fish

Apolemichthys xanthurus, the Indian yellowtail angelfish, is a species of marine angelfish belonging to the family Pomacanthidae. Other common names include cream angelfish, smoke angelfish, and yellowtail black angelfish. It is found in the Indian Ocean.

<i>Apolemichthys griffisi</i> Species of fish

Apolemichthys griffisi, or Griffis angelfish, is a species of ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the Pacific Ocean. It is a rarity for the species to enter the aquarium trade.

<i>Centropyge potteri</i> Species of fish

Centropyge potteri, commonly known as the russet angelfish, Potter's angelfish or Potter's pygmy angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the central Pacific Ocean.

<i>Genicanthus lamarck</i> Species of fish

Genicanthus lamarck, the blackstriped angelfish or Lamarck's angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It occurs in the Indo-West Pacific region.

<i>Pomacanthus xanthometopon</i> Species of fish

Pomacanthus xanthometopon is a marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae found in shallow parts of the Indo-Pacific. It is commonly known as the blueface angelfish or the yellowface angelfish because of its striking facial colouration.

Goldtail angelfish Species of fish

The goldtail angelfish, also known as the earspot angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the western Indian Ocean.

<i>Holacanthus africanus</i> Species of fish

Holacanthus africanus, the Guinean angelfish or West African angelfish, is species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the warmer sections of the eastern Atlantic Ocean off the coast of West Africa.

References

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