dace

noun2

1. •
   A shoal-forming fish of species Leuciscus leuciscus, common to swift rivers in England and Wales and in Europe.

   • Somewhere near at hand, though out of sight, there was a clear, slow-moving stream where dace were swimming in the pools under the willow trees. — 1949
2. •
   (US) Any of various related small fish of the family Cyprinidae that live in freshwater and are native to North America.