Arctic rockling

The Arctic rockling (Gaidropsarus argentatus), also called the silver rockling or Arctic threebeard, is a species of fish in the family Lotidae.

Description
The Arctic rockling's maximum length is 35 cm. It has two dorsal fins and one anal fin, with the first ray in the first dorsal fin being elongated to form a whisker-like projection. It has 51–53 vertebrae (including urostyle). The upper body is brown-red, its belly pink, there is a blue hue around its head, and the barbels and fin tips are red. The young are silvery in colour, hence the name.

Habitat
Arctic rockling live in the northeastern Atlantic Ocean, in very cold water, 0 C or lower. It is epibenthic, living over gravel, mud or sand at depths of 400 - 500 m, sometimes as shallow as 150 m.

Behaviour
Arctic rockling feed on decapod, amphipod, and euphausiid crustaceans, and fish.