Abyssal halosaur

The abyssal halosaur (Halosauropsis macrochir) is a bottom-dwelling deep-sea fish of the family Halosauridae and the only member of its genus. It is found in all oceans at depths from about 1100 to 3500 meters. Individuals can reach a total length of at least 76 centimetres and a weight above 400 grams. Fish smaller than about 25 centimetres could not be sexed in a study on the Mid-Atlantic Ridge, which suggests that maturation sets in once an individual reaches a certain length. The species is long-lived, with a maximum reported age of 36 years, although most fish sampled on the Mid-Atlantic Ridge were younger than 20 years. It appears to be an opportunistic feeder that takes mostly epibenthos, meaning small animals living on the sea floor, and small fish. The IUCN Red List assesses the species as Least Concern.