Commonly known as the Atlantic cod, is considered a demersal fish, although its habitat may become pelagic under certain hydrographic
conditions, when feeding or spawning. The presence of cod usually depends on
prey distribution rather than on temperature. However, whatever the reason,
larger fish are found in colder waters in most areas(0-50C).
It lives in almost any salinity from nearly fresh to full oceanic water, and in a wide range of temperatures from
nearly freezing to 200C.
While Atlantic fish is essentially a fish of the open sea, it appears regularly
in various river mouths in Maine and Massachusetts during late
autumn and winter.
The species is widely distributed in a variety of habitats from the shoreline to well down the continental shelf, to depths over 600 m, but is mostly found within continental shelf areas from 150-200 m.
The size varies, yet the oceanic cod often reaches 1 m and it is known to attain a length of 2 meters.