Channichthys irinae
Illustration of the holotype
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Channichthyidae
Genus: Channichthys
Species:
C. irinae
Binomial name
Channichthys irinae
Shandikov, 1995

Channichthys irinae, the pygmy icefish, is a species of marine ray-finned fish belonging to the family Channichthyidae, the crocodile icefishes. It is endemic to the Kerguelen Islands in the Southern Ocean.

Taxonomy

Channichthys irinae was first formally described in 1995 by the Ukrainian based ichthyologist Gennadiy A. Shandikov with the type locality given as the southwestern Indian Ocean, northeast of Kerguelen Island. Fishbase treats it as a valid species but Catalog of Fishes treats it as a junior synonym of C. panticapaei.[1][2]

Description

Channichthys irinae grows to a maximum length of 25.9 cm (10.2 in). This species is very similar to Channichthys mithridatis (to which it is closely related), but it has more gill rakers in more and longer rows (21 to 30 in two rows for C. irinae compared to 11 to 16 in one row for C. mithraditis). Distinguishing factors from other Channichthys species also include the fact that it has the largest eye diameter relative to snout length (45.9% at the very least, with specimens sometimes reaching 56%).[3]

Distribution, habitat and biology

Channichthys irinae is endemic to the Southern Ocean around the Kerguelen Islands. It is a demersal species living at depths of 165 to 310 m (540 to 1,020 ft).[3] This species mainly feeds on pelagic zooplankton and is of no interest to commercial fisheries.[2]

References

  1. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Channichthys". Catalog of Fishes. California Academy of Sciences. Retrieved 18 October 2021.
  2. 1 2 Froese, Rainer; Pauly, Daniel (eds.) (2021). "Channichthys irinae" in FishBase. June 2021 version.
  3. 1 2 G. A. Shandikov (2008). "Channichthys mithraditis, a new species of icefishes (Perciformes: Notothenioidei: Channichthydae) from the Kerguelen Islands, with comments on the taxonomic status of Channichthys normani" (PDF). Visnyk Charkivs'koho Universytetu Imeni V. N. Karazina, Ser. Biologija, Charkiv. 8 (814): 123–131.
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