The mouth of a piranha, no matter how tiny, is packed with sharp, triangular teeth that are tailor-made for puncturing and tearing the flesh of prey.

• 不管多小的食人鱼，它的嘴都有着尖锐的三角形牙齿，这种牙齿就是为穿透并撕碎猎物的皮肉而量身定做的。