red-bellied piranha in Podcasts

The red-bellied piranha, Pygocentrus nateri, is the dreaded species most responsible for Hollywood's whole reputation of these fish, and its Pygocentrus relatives all share that convex, bulldog-shaped head-slash-face and proportionally massive lower jaw packed with razor-sharp triangular teeth with each tooth fitting into a socket on the adjacent tooth, and thus forming what is essentially a continuous serrated blade that runs the entire length of the jaw.