Mega Piranha

Mega Piranhas are the titular creatures from the 2010 movie Mega Piranha.

Appearance
They look similar to Red-Bellied Piranhas, but they are a dark beige in color. Unlike most Piranhas, their faces appear to be armored, and their teeth are jagged. They grow at an accelerated rate, eventually growing large enough to devour whole helicopters in a single bite and destroy battleships in large swarms.