Carp (Fish) is a group of freshwater fish that are found in temperate climates around the world. The most common species of Carp are the Rudd, Dace, and GOLDFISH. The Rudd is a small, silver-colored fish with a red-orange dorsal fin. The Dace is a small, slender fish with a dark back and silvery sides. The GOLDFISH is a larger, bright orange fish with long fins and a rounded body. All three species of Carp are popular aquarium fish and can be found in many pet stores.