prickleback has definitions from the field of zoology
1
[ noun ] (zoology) small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines
2
[ noun ] (zoology) small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research

Synonyms

stickleback

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