Rough-toothed Dolphin, Steno bredanensis, named for the subtle ridges and wrinkles on the teeth, is most readily distinguished by a forehead rising gradually from the narrow beak. The species has been described as looking reptilian in appearance. They have large flippers and a central dorsal fin. Average body mass is reported as 130 kg. Size reaches 2.6 m in females and 2.8 m in males. The body is gray in color, with lighter shades on the belly and sides.
This cetacean is found in the western coast of Africa from Mauritania to Namibia, mainly at and beyond the edges of the continental shelves in deep water where they hunt a variety of fish, squid, mollusks, and octopi. The narrow continental shelves of the Nigerian coast, however, limit the productivity of the waters. Sexual maturity in the Rough-toothed Dolphin is attained in this cetacean at 10-14 years and lifespan reaches up to 32 years.