Pacific cod ( Gadus macrocephalus) is found in both eastern and western regions of the Pacific. Pacific cod are smaller than Atlantic cod and are darker in colour.Ītlantic cod ( Gadus morhua) live in the colder waters and deeper sea regions throughout the North Atlantic. Its average weight is 5–12 kilograms (11–26 pounds), but specimens weighing up to 100 kg (220 lb) have been recorded. It has two distinct colour phases: gray-green and reddish brown. The Atlantic cod can change colour at certain water depths. Dark brown colouration of the back and sides is not uncommon, especially for individuals that have resided in rocky inshore regions. The back tends to be a greenish to sandy brown, and shows extensive mottling, especially towards the lighter sides and white belly. Cod have a distinct white lateral line running from the gill slit above the pectoral fin, to the base of the caudal or tail fin. The eyes are medium-sized, approximately the same as the length of the chin barbel. The upper jaw extends over the lower jaw, which has a well-developed chin barbel. the throat region), in front of the pectoral fins. The pelvic fins are small, with the first ray extended, and are set under the gill cover (i.e.
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