noun \ˈte-trə\

Definition of TETRA

:  any of numerous small often brightly colored South American characin fishes often bred in tropical aquariums

Origin of TETRA

by shortening from New Latin Tetragonopterus, former genus name, from Late Latin tetragonum quadrangle + Greek pteron wing — more at tetragonal, feather
First Known Use: 1931

Other Fishes Terms

char, chum, ichthyology, smelt, turbot


noun    (Concise Encyclopedia)

Glowlight tetras (Hemigrammus erythrozonus)—Jane Burton/Bruce Coleman Ltd.

Any of numerous attractively coloured freshwater South American and African fishes (family Characidae), often kept in home aquariums. Tetras are small, lively, hardy, and unaggressive. The slender neon tetra (Paracheirodon, or Hyphessobrycon, innesi) has gleaming red hind parts and a neonlike blue-green stripe on its sides. The glowlight tetra (Hemigrammus erythrozonus) has a shining red stripe along each side. The body of the silver tetra (Ctenobrycon spilurus) is flattened sidewise.


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