Roach, or Cyprinus rutilus, L. a well-known British fish. found in ponds, and still, deep rivers: its body is broad, though thin; the back much elevated, and sharply ridged; the scales are large and deciduous.

Roaches are gregarious fish, remarkably prolific, and active ; but seldom attain to any considerable size. They are caught in a manner similar to Dace, and are much esteemed for their delicacy.