Longfin smooth-head

The longfin smooth-head (Conocara macropterum) is a species of fish in the family Alepocephalidae.

Description
The longfin smooth-head is pale brown to black in colour; its name derives from its anal fin, which has a long base and 35–39 finrays. Its maximum length is 34 cm. They grow rapidly from infancy; few juveniles of intermediate size are found.

Habitat
The longfin smooth-head lives in the temperate and tropical Atlantic Ocean, and in the Gulf of Mexico;  it is bathypelagic, living at depths of 800 - 2200 m, being most common at 1200 - 1800 m.

Behaviour
The longfin smooth-head lays large eggs, up to 6 mm in diameter, and are believed to be buried in redds, similar to how the Atlantic salmon buries its eggs. A detritivore, the longfin smooth-head is recorded to ingest sediment from the seafloor, taking up with it microfauna such as foraminiferans.