quillback

quillback [kwil-bak] Word Origin noun, plural quill·backs, (especially collectively) quill·back.

1. a carpsucker, Carpiodes cyprinus, inhabiting waters in the central and eastern U.S., having one ray of the dorsal fin greatly elongated.

Origin of quillback An Americanism dating back to 1880–85; quill + back1 Also called quillback carpsucker.