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(Scardinius erythrophthalmus), stout-bodied freshwater sport fish of the carp family, Cyprinidae, similar to the related roach, but more golden, with yellow-orange eyes, deep red fins, and a sharp-edged belly. The rudd is widely distributed in Europe and Asia Minor and has been introduced into the United States, where it is called American, or pearl, roach. It is a schooling fish that frequents thickly planted, reedy lakes and slow rivers and eats plants, small animals, and insects. Maximum length and weight are about 35-40 centimetres (14-16 inches) and 1-2 kilograms (2-4 12 pounds)