Subfamily Oreosomatinae Allocyttus Neocyttus Oreosoma Subfamily Pseudocyttinae Pseudocyttus Oreosomatidae, the oreos, are a family of marine fish.

Most species are found in the Southern Hemisphere, inhabiting continental slopes down to about 1,000 m (3,300 ft) deep.

Though they are small, they often have incredibly elongated lifespans, probable result of living in the deep sea (a trait shared with other unrelated fishes like the orange roughy).

The warty oreo is able to live for up to 210 years, which puts it at one of the longest living vertebrates on Earth.

The upper part of the mouth is protractile, allowing them to snatch up little fishes, copepods, amphypods, shrimp, krill, and small cephalopods, their main diet.