Boreogadus

Boreogadus saida, known as the polar cod or as the Arctic cod, is a fish of the cod family Gadidae, related to the true cod (genus Gadus). Another fish species for which both the common names Arctic cod and polar cod are used is Arctogadus glacialis.

== Description == alt=The image shows a close-up view of five Boreogadus saida lying horizontally in a pile within a plastic basket with orange slats. Each fish has a number label placed above it, ranging from 1 to 5, helping distinguish them from one another. These fish appear similar in shape and color, with silvery bodies, large eyes, and prominent mouths. However, the top three fish, labelled 1 to 3, are slightly darker in color. The bottom two fish, labelled 4 to 5, are slightly lighter in color and smaller.|thumb|Dark (1,2,3) and Light (4,5) Polymorphism (biology)|morphotypes described by Inuit fishers|259x259px|leftArctic cod have slender bodies, deeply forked tails, a projecting mouth, and a small chin barbel. They have three dorsal fins and two anal fins, which are all separate from each other. The caudal fin is concave, the pectoral fins reach beyond the end of the first dorsal fin, and the pelvic fins are elongated rays. The lateral line is interrupted along the entire length of the fish.