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Large category that can include any member of the classes Cephalochordata (lancelets), Agnatha (hagfish and lampreys), Elasmobranchii (sharks and rays), Holocephali (ghost sharks), Osteichthyes (bony fish), Gastropoda (gastropods), Pelecypoda (bivalves), Cephalopoda (cephalopods), and Crustacea (crustaceans).

Contributors in Fish


Paedocypris progenetica

Animals; Fish

A tiny fish found in Indonesia's Sumatra Island is the smallest vertebrate animal in the world. The creature is called “Paedocypris progenetica” and is related to the tent, although it measures only ...


Animals; Fish

The swordfish is named after its bill resembling a sword . This makes it superficially similar to other billfish such as marlin, but upon examination their physiology is quite different and they are ...


Animals; Fish

A variety of European perch. It is considered one of the most valuable food fishes native to Europe. It is esteemed for its light, firm but tender meat with few bones and a delicate flavor.


Animals; Fish

The Florida and West Indian red, glass-eyed snapper ; also, sometimes, one of certain other allied species, as L. caxis.


Animals; Fish

Yellow eel formerly used in medicinal foods.


Animals; Fish

Large Atlantic fish like the cod.


Animals; Fish

Small, plentiful, shrimp-like, luminescent crustaceans that live in the open ocean. They are about 1 inch (2.5 cm) long. They form an important element in marine plankton.

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