pricklebacks

'pricklebacks'

[prickleback.n.01] as in: small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines

'pricklebacks'

[stickleback.n.01] as in: small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research