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stickleback

DEFINITIONS OF: stickleback

1

n small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research

Synonyms:
prickleback
Types:
Gasterosteus aculeatus, three-spined stickleback
of rivers and coastal regions
Gasterosteus pungitius, ten-spined stickleback
confined to rivers
Type of:
acanthopterygian, spiny-finned fish
a teleost fish with fins that are supported by sharp inflexible rays
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