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Stickleback

noun

Noun

1
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.
"[I]n my exile and irkeſome diſcontented abandonment, the ſillieſt millers thombe, or contemptible ſtickle-banck of my enemies, is as buſie nibbling about my fame, as if I were a deade man throwne amongeſt them to feede vpon."
2
small (2-4 inches) pugnacious mostly scaleless spiny-backed fishes of northern fresh and littoral waters having elaborate courtship; subjects of much research wordnet

From dialectal stickle (“a prickle, spine, sting”), from Old English sticel + bæc. See stick (transitive verb) and compare banstickle.

Unscramble this word: stickleback