A large shark with a broad flattened rounded head; eyes small, oval; a pair of barbels below snout; grooves present between nostrils and mouth; mouth below, with multi-pointed teeth; 5 gill slits, last 2 close together and over pectoral; two dorsal fins of similar size; tail fin moderately long, about one-third of TL, with almost no lower lobe.
Yellow brown to grey brown; young with small dark spots and obscure saddle markings on back.
Size: to ~ 300 (possibly 430) cm
Lives around reefs, mangroves, and sand flats
Depth range 0-130 m
From southern Baja and the Gulf of California to Peru, Malpelo; also on both sides of the Atlantic ocean.