How many teeth do piranhas have?

All piranhas have a single row of sharp teeth in both jaws. The teeth are tightly packed and interlocking (via small cusps) and are used for rapid puncture and shearing. Individual teeth are typically broadly triangular, pointed, and blade-like (flat in profile). The variation in the number of cusps is minor. read more

Piranhas do indeed have sharp teeth, and many are carnivorous. But there’s a lot of diet variation among species—that’s one reason piranhas have proved hard to taxonomically classify. Piranhas are also hard to tell apart in terms of species, diet, coloration, teeth, and even geographic range. read more

Piranhas have just a single row of triangular teeth on both the upper and lower jaws. Their close relatives, the pacu, have two rows of square teeth. read more