The Collaborative International Dictionary of English v.0.48:
Dace \Dace\ (d[=a]s), n. [Written also dare, dart, fr. F. dard
dase, dart, of German origin. Dace is for an older darce, fr.
an OF. nom. darz. See Dart a javelin.] (Zool.)
A small European cyprinoid fish (Leuciscus leuciscus,
formerly Squalius leuciscus or Leuciscus vulgaris); --
called also dare.
[1913 Webster +PJC]
Note: In America the name is given to several related fishes
of the genera Squalius, Minnilus, etc. The
black-nosed dace is Rhinichthys atronasus the horned
dace is Semotilus corporalis. For red dace, see