12 pounds or more. The exact size of the crucian carp depends on factors such as the living environment of the crucian carp, wild crucian carp can grow to more than 12 centimeters, as of May 10, 2023 the largest crucian carp found was 52.5 kilograms. Carp is abbreviated as crucian carp, and is commonly known as carp guazi, moon carp, earth crucian carp, fine head, perch, cold perch, happy head, crucian carp shell, river crucian carp. Common in Eurasia, for common freshwater fish, belonging to the spoke fin fish subclass Carpiformes carp family Carp genus.