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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



Animals; Fish

Salmon first returning to the river from the sea.


Animals; Fish

A piranha or piraña is a member of family Characidae in order Characiformes, an omnivorous freshwater fish that inhabits South American rivers. They are known for their sharp teeth and a voracious ...

AquAdvantage salmon

Food (other); Fish

Genetically engineered salmon made of eggs produced in a hatchery in Prince Edward Island. The Boston based company AquaBounty Technologies spent over 14 years at a cost of US$50m to create the ...


Animals; Fish

A small, brightly colored live-bearing freshwater fish native to northern South America and adjacent islands of the West Indies and popular in home aquariums. The guppy is one of the most popular ...

eyestripe surgeonfish

Animals; Fish

The eyestripe surgeonfish (Acanthurus dussumieri) has a yellow brown to gray brown body with fine, irregular blue lines . It has a yellow spot behind the eye, and a yellow band through the eye. The ...


Animals; Fish

The oarfish is one of the world's longest bony fish, a group that includes almost all fish except sharks and rays. Whale sharks are the largest fish in the ocean. Oarfish have been measured to reach ...

pectoral fin

Animals; Fish

One of the two pairs of fins that are found at the front of the body of a fish.

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