Warty oreo

The warty oreo (Allocyttus verrucosus) is an oreo found in all southern oceans at depths of between 300 and 1,600 m. Its length is up to 42 cm.

Warty oreo
Drawing by Dr Tony Ayling

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Actinopterygii
Order:
Zeiformes
Family:
Oreosomatidae
Genus:
Allocyttus
Species:
A. verrucosus
Binomial name
Allocyttus verrucosus
Gilchrist, 1906

The warty oreo resembles the spiky oreo. However, there are differences: the body, which has a shape much like a diamond, has a lower corner not as pointed, a dorsal which is not as tall as that of the spiky oreo, and there are spines along the warty oreo's anal fin. In addition, there are two rows of scales, which are relatively large and warty, bedecking the sides of the warty oreo between the fish's pelvic fin and its anal fin. The warty oreo has a dark gray colour and is black-finned. They have only 1 spine in their pelvic fins. They have large eyes, possibly to see easier in the darkness of their habitat.

Warty oreos live in the waters of continental slopes, and they form in large schools over rough terrain. Young warty oreos are pelagic and reside in shallow waters of the oceans - less than a kilometer in depth. They eat other fish, as well as cephalopods and shrimp. The eggs and larvae of warty oreos live on or near the surface of the sea.

They are very long living creatures, the oldest living to be 210 years old. This sets it as one of the longest living macrovertebrates in the world, along with the Greenland shark, the Orange roughy and the Bowhead whale, that can reach 400, 250 and 200 respectively.

References
  1. Iwamoto, T. 2015. Allocyttus verrucosus. The IUCN Red List of Threatened Species 2015: e.T21133195A22477122. doi:10.2305/IUCN.UK.2015-4.RLTS.T21133195A22477122.en. Downloaded on 21 July 2020.
  • Ayling, Tony (1982). Collins guide to the sea fishes of New Zealand. With 48 colour plates by Geoffrey J. Cox. Auckland: Collins. ISBN 0002169878.
  • Froese, Rainer and Pauly, Daniel, eds. (2006). "Allocyttus verrucosus" in FishBase. March 2006 version.
  • "Warty oreo (Allocyttus verrucosus) longevity, ageing, and life history". AnAge: The Animal Ageing and Longevity Database. Human Ageing Genomic Resources. October 14, 2017. Retrieved August 24, 2018.
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