Atlantic cod
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The Atlantic cod is a fish of the family Gadidae, widely consumed by humans. It is also commercially known as cod or codling. Dry cod may be prepared as unsalted stockfish, and as cured salt cod or clipfish.
Image: Atlantic Cod, Atlantischer Kabeljau (Gadus morhua)
Image: Atlantic cod
Atlantic cod are demersal fish—they prefer sea bottoms with coarse sediments.
Spawning female in captivity
Shoaling and schooling
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In biology, any group of fish that stay together for social reasons are shoaling, and if the group is swimming in the same direction in a coordinated manner, they are schooling. In common usage, the terms are sometimes used rather loosely. About one quarter of fish species shoal all their lives, and about one half shoal for part of their lives.
These powder blue tangs are shoaling. They are swimming somewhat independently, but in such a way that they stay connected, forming a social group.
These bluestripe snapper are schooling. They are all swimming in the same direction in a coordinated way.
Schools of forage fish often accompany large predator fish. Here a school of jacks accompany a great barracuda.
A school of fish has many eyes that can scan for food or threats