any of various small cyprinid fishes of the genus Notropis, esp N. cornutus. They have reddish fins and are popular aquarium fishes
WordReference Random House Unabridged Dictionary of American English © 2026
red•fin
(red′fin′),USA pronunciation n.
- Fishany of various small freshwater minnows with red fins, esp. a shiner, Notropis umbratilis, of streams in central North America.
- red1 + fin 1785–95
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