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. The warty oreo resembles the

spiky oreo The spiky oreo (''Neocyttus rhomboidalis'') is an oreo of the genus ''Neocyttus ''Neocyttus'' is a genus of oreos. Species There are currently four recognized species in this genus: * '' Neocyttus acanthorhynchus'' Regan, 1908 * ''Neocyttus h ...

. 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 Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...

. In addition, there are two rows of

scale Scale or scales may refer to: Mathematics * Scale (descriptive set theory), an object defined on a set of points * Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original * Scale factor, a number ...

s, which are relatively large and warty, bedecking the sides of the warty oreo between the fish's

pelvic fin Pelvic fins or ventral fins are paired fins located on the ventral surface of fish. The paired pelvic fins are homologous to the hindlimbs of tetrapods. Structure and function Structure In actinopterygians, the pelvic fin consists of two en ...

and its anal fin. The warty oreo has a dark gray colour and is black-finned. They have only 1 spine in their

s. 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

cephalopod A cephalopod is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head ...

s and

shrimp Shrimp are crustaceans (a form of shellfish) with elongated bodies and a primarily swimming mode of locomotion – most commonly Caridea and Dendrobranchiata of the decapod order, although some crustaceans outside of this order are refer ...

. 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 The bowhead whale (''Balaena mysticetus'') is a species of baleen whale belonging to the family Balaenidae and the only living representative of the genus ''Balaena''. They are the only baleen whale endemic to the Arctic and subarctic waters, ...

, that can reach 400, 250 and 200 respectively.

References

* * * {{Taxonbar, from=Q2750718 Oreosomatidae Fish described in 1906