The difference between grass carp, silver carp, carp, crucian carp and bighead carp

AB key table distinguishes them, you can make one yourself.

simple

1 has obvious scales on its body surface. ............................. 1.

-1 .................. with obvious pectoral fin, dorsal fin and caudal fin 1.

-1 Carp with beard in .............................

-2 ............................ does not need crucian carp.

-2 There is no obvious pectoral fin, dorsal fin and caudal fin on the body surface or it is highly degraded ... 1

There are no obvious scales on the body surface or scales are highly degraded. ................ 1.

-1 Misgurnus anguillicaudatus with obvious pectoral fin, dorsal fin and caudal fin in .................

-2 There is no obvious pectoral fin, dorsal fin and caudal fin on the body surface, or the eel is highly degraded.