prickleback
(noun)
noun
1. small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines
Definition categories: animal, blennioid
2. small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research
Similar word(s): stickleback
Definition categories: animal, acanthopterygian