Cambridge Encyclopedia :: Cambridge Encyclopedia Vol. 65
 

rudd

Freshwater fish (Scardinius erythrophthalmus) widespread in European rivers and lakes, ranging E to the Caspian region; length up to 40 cm/16 in; greenish-brown on back, sides yellow, fins reddish; feeds on invertebrates as well as on some plant material; popular with anglers. (Family: Cyprinidae.)

Portions of the summary below have been contributed by Wikipedia.
iRudd

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cyprinidae
Genus: Scardinius
Species: S.
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