Invasive carp - bighead, black, grass and silver carp

Joseph Tomelleri illustrations of a bighead, black, grass and silver carp with defining characteristics. Bighead carp are silver in color, no scales on head, no barbels on nose, low set eyes, downward slanting mouth, dark blotches along the back and a keel that extends partway along belly. Black carp are darker in color with large scales, no scales on head, a pointy shaped face and teeth that look like human molars. Grass carp defining characteristics include olive-brown or silver in color, no scales on head, large scales and eye centered on a flattened head with an oblong body. Silver carp are silver in color, no scales on head, no barbels on nose, low set eyes, downward slanting mouth, small scales and a keel that extends to the throat.