Very sharp, pointy teeth
The red piranha is a legendary fish from the Amazonia in South America. From the Characidae family, it has very sharp, pointy teeth on both jaws which it uses to tear large prey to pieces. That is why they have the unfortunate, but famous reputation to be men-eaters. Which is not true if they have enough food. It’s only when the water level drops that they can become aggressive and eat each other.