sentences:  Each has a teardrop-shaped crown covered by small pits, and bears a central ridge and typically three marginal teeth.There is a crest of enlarged denticles along the front portion of the caudal fin dorsal margin.This species is light gray above and lighter below; there is a small, dark saddle below each dorsal fin base, as well as two more saddles on the caudal fin, the second of which almost forms a complete ring.