| Halfbanded angelfish | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Pomacanthidae |
| Genus: | Genicanthus |
| Species: | G. semicinctus |
| Binomial name | |
| Genicanthus semicinctus (Waite, 1900) | |
| Synonyms [2] | |
Holocanthus semicinctusWaite, 1900 | |
The halfbanded angelfish (Genicanthus semicinctus) is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the southwestern Pacific Ocean.
Genicanthus semicinctus like the other angelfishes in the genus Genicanthus , shows sexual dichromatism, the males and females show differences in colour and pattern. The males are marked with thin close-set wavy black, vertical bars which run from the back to two-thirds down the flanks with the lower third of the body being yellowish-orange. They have a yellow dorsal fin and yellow lobes with long filaments on the caudal fin which has black spots. The chest also has black spots. The females are plain dark grey on the back with a whitish abdomen and have dark lobes to the caudal fin. Their fins have thin blue margins and there is a black blotch above the eye, this has a vivid blue margin. [3] The dorsal fin contains 15 spines and 15-16 soft rays while the anal fin has 3 spines and 17 soft rays. This species attains a maximum total length of 21 centimetres (8.3 in). [2]
Genicanthus semicinctus is found in the southwestern Pacific Ocean. Here it is found only around Lord Howe Island, an Australian territory in the Tasman Sea, and the New Zealand outlying islands of the Kermadec Islands. [1]
Genicanthus semicinctus is found at depths between 10 and 100 metres (33 and 328 ft). [1] it is found on the deep outer slopes of coral and rocky reefs. It normally occurs in small groups, harems of a male and as many as 4 females. This species is a protogynous hermaphrodite and if the male in a group disappears the dominant female will change into a male, this change takes a few weeks. [3]
Genicanthus semicinctus was first formally described as Holocanthus semicinctus in 1900 by the British-born Australian ichthyologist Edgar Ravenswood Waite (1866–1928) with the type locality given as Lord Howe Island. [4] The specific name is a compound of semi meaning “half” and cinctus meaning “bands”. [5]
Genicanthus semicinctus is very rare in the aquarium trade. [1]
The lemonpeel angelfish, also known as the yellow angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the Indo-Pacific region.
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Centropyge tibicen, the keyhole angelfish, black angelfish, whitespot angelfish or puller angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the Indo-Pacific region.
Centropyge multicolor, the multicolor angelfish or pearlback angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is from the Pacific Ocean that sometimes makes its way into the aquarium trade. It grows to a size of 9 cm in length.
Centropyge ferrugata, the rusty angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. The rusty angelfish comes from the Western Pacific Ocean and sometimes makes its way into the aquarium trade.
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.
Centropyge vrolikii, known commonly as the pearlscale angelfish or half black angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the Indo-Pacific.
Genicanthus personatus the masked angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is endemic to Hawaii.
Genicanthus melanospilos, the spotbreast angelfish, blackspot angelfish or swallowtail angelfish, the family Pomacanthidae. It occurs in the Indo-West Pacific region.
Genicanthus caudovittatus, the zebra angelfish, swallowtail angelfish, and lyretail angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the Indian Ocean.
Genicanthus takeuchii, the spotted angelfish or Takeuchi’s angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the northwestern Pacific Ocean
The Pitcairn angelfish is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the southwestern Pacific Ocean.
The Clipperton angelfish is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is endemic to Clipperton Island, a French possession in the eastern Pacific Ocean.
