Meaning of bitterling

bit•ter•ling

Pronunciation: (bit'ur-ling), [key]
— n.
  1. a cyprinid fish, Rhodeus sericeus, found in central and eastern Europe, the female of which has a long, bright yellow or red ovipositor to deposit eggs in the mantle cavity of mussels.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.