| Parachaenichthys | |
|---|---|
 | |
| Parachaenichthys charcoti | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Bathydraconidae |
| Genus: | Parachaenichthys Boulenger, 1902 |
| Type species | |
| Chaenichthys georgianus Fischer, 1885 | |
Parachaenichthys is a genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes. They are found in the Southern Ocean around Antarctica.
Parachaenichthys was first described as a genus in 1902 by the Belgian-born British ichthyologist George Albert Boulenger with Chaenichthys georgianus designated as the type species by monotypy, i.e. it was the only species in the new genus at the time of genus description. [1] Chaenichthys georgianus had been described in 1885 by the German zoologist J.G. Fischer with the type locality given as South Georgia. [2] The genus name Parachaenichthys is a compound of para meaning "near" or "similar to" and Chaenichthys, i.e. Channichthys the genus P. georgianus was originally placed in by Fischer. [3]
There are currently two recognised species in this genus: [4]
Parachaenichthys dragonfishes have a naked body, lacking in scales, except for lateral line scales. They have a long, broad snout and the jaws have multiple bands of small, canine-like teeth. The operculum has a clear ridge which splits up into subridges towards the rear margin, each of these subridges ends in a spine. [5] P. charcoti attains a maximum standard length of 42 cm (17 in) while P. georgianus reaches 59 cm (23 in). [4]
Parachaenichthys dragonfishes are found in the Southern Ocean with P. georgianus restricted to South Georgia and the South Sandwich Islands [6] while P. charcoti is found at the South Orkney Islands, South Shetland Islands and Elephant Island, as well as at the tip of the Antarctic Peninsula south as far as 65°S. [7] They are demersal fishes found at depths ranging from 2 to 400 m (6 ft 7 in to 1,312 ft 4 in). [7] These fishes feed on other fishes and crustaceans. [5]
The Bathydraconidae, or the Antarctic dragonfishes, are a family of marine ray-finned fishes, notothenioids belonging to the Perciform suborder Notothenioidei. The family comprises four genera. These fishes are endemic to deep waters off Antarctica.
Champsocephalus esox, the pike icefish or northern icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes.
Chionodraco hamatus is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is found in the Southern Ocean.
Champsocephalus is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are native to the Southern Ocean.
Acanthodraco is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is DeWitt’s dragonfish. They are found in the Southern Ocean and the southeastern Pacific Ocean.
Akarotaxis is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfish, its only species is Akarotaxis nudiceps. They are found in the Southern Ocean along the continental shelf of Antarctica.
Bathydraco is a genus of marine ray-finned fishes belonging to the family Bathydraconidae, the Antarctic dragonfishes. They are native to the Southern Ocean.
Mawson's dragonfish is a species of Antarctic dragonfish native to the Southern Ocean around Antarctica. It is found at depths of from 110 to 300 metres over the continental shelf. This species is the only known member of its genus.
Gerlachea is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is Gerlachea australis. It is found at depths of from 200 to 670 metres over the Antarctic continental shelf. This species is the only known member of its genus.
The ploughfish is a species of Antarctic dragonfish native to the Southern Ocean around Antarctica. It is found at depths of from 0 to 550 m over the Antarctic continental shelf. This species is the only known member of its genus.
Prionodraco is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is Prionodraco evansii. These fishes are native to the Southern Ocean.
Psilodraco is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is Psilodraco breviceps. These fishes are native to the Southern Ocean.
Racovitzia is a genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes. They are found in the Southern Ocean around Antarctica.
Vomeridens is a monotypic genus of marine ray-finned fish belonging to the family Bathydraconidae, the Antarctic dragonfishes, its only species is Vomeridens infuscipinnis. These fishes are native to the Southern Ocean.
Chionobathyscus dewitti is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. This species is found in the Southern Ocean.
Chionodraco is a genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. They are found in the Southern Ocean.
Pseudochaenichthys is a monotypic genus of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. Its only member is Pseudochaenichthys georgianus, the South Georgia icefish, which is found in the Southern Ocean.
Gobionotothen is a genus of marine ray-finned fishes belonging to the family Nototheniidae, the notothens or cod icefishes. They are native to the Southern Ocean.
The grey rockcod, also known as the grey notothen, stripe-eyes notothen or stripe-eyed rockcod, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Southern Ocean. The grey rockcod feeds mainly on macrozooplankton and is of minor importance to commercial fisheries. It is the only species in the genus Lepidonotothen.
Gvozdarus svetovidovi, the naked-head toothfish, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is found in the Ross and Cooperation Seas, probably south of the Antarctic Polar Front from pelagic waters down to depths of 550 m (1,804 ft), though it is normally found in a pelagic environment.