Black carp (Mylopharyngodon piceus) Black carp are elongated fish with a fusiform body. They appear dusky gray, brown or bluish black and have dark fins. Their dorsal fin is high and pointed. In comparison to grass carp, the distances from the eye to the superior and inferior edges of the pre-operculum are respectively longer, contributing to the elongate appearance of the scaleless head. Unlike in grass carp, the upper lip does not appear to protrude beyond the lower lip when viewed from above with the fish’s mouth closed. Black carp have large cycloid scales on their body and a forked tail fin behind a broad caudal peduncle.