STICKLEBACK
stickleback, prickleback
(noun) small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research
Source: WordNet® 3.1
Etymology
Noun
stickleback (plural sticklebacks)
Any one of numerous species of small fish of the family Gasterosteidae. The back is armed with two or more sharp spines. They inhabit both salt and brackish water, and construct nests from weeds.
Synonyms: sticklebag, sharpling
Source: Wiktionary
Stic"kle*back`, n. Etym: [OE. & Prov E. stickle a prickle, spine,
sting (AS. sticel) + back. See Stick, v. t., and cf. Banstickle.]
(Zoöl.)
Definition: Any one of numerous species of small fishes of the genus
Gasterosteus and allied genera. The back is armed with two or more
sharp spines. They inhabit both salt and brackish water, and
construct curious nests. Called also sticklebag, sharpling, and
prickleback.
Source: Webster’s Unabridged Dictionary 1913 Edition