White barracudina, Arctozenus rissoi.
White Barracudina, Arctozenus rissoi

This long bright silver fish is a fish swimmer and lives in small schools, or alone, throughout the mid-depths of the North Atlantic Ocean. It is found from the Davis Strait south to Georgia, usually at depths between 200 and 1000 m, but younger individuals are found in shallower water. Sometimes, in the north, this cold-loving species ventures into waters as shallow as 64 m. Because of this, it is one of the more commonly encountered barracudina species at high latitudes. It uses its speed to catch small fishes and crustaceans, and, in turn, is an important component in the diet of Atlantic cod, swordfishes, redfishes, and seals.

The white barracudina is distinguished from other species by its pectoral fins, which are shorter than its anal fin, by the teeth on its lower jaw that have smooth rather than ragged edges, and by the presence of scales on its body. Its anal fin has many rays and thus extends along the body for some length, ending close to the caudal fin. This fish also has a black band of colour on its back and reaches about 30 cm in length.