DACE, DARE or DART (Leuciscus leuciscus), a Cyprinid fish of the rivers of Siberia, Europe north of the Alps and Pyrenees, and England. It is closely related to the chub, but has a smaller head and smaller mouth. It is a graceful fish, silvery in coloration, and an active swimmer; it rarely reaches a length of more than i zin. In America the name is given to other Cyprinidae, e.g., the Horned Dace (Servotilus atromaculatus).