食人鱼 shí rén yú 食人鲳

食人鲳，【Pygocentrus nattereri (Serrasalmus nattereri)】也称食人鱼，是分布于南美洲亚马逊河中的一种鱼，是水虎鱼（Piranha）的一种。水虎鱼有近56种，属脂鲤科中的锯鲑脂鲤亚科，按食性不同，可分为：杂食性，肉食性两种。肉食性的食人鲳，正名红腹锯鲑脂鲤（nattereri），即纳氏锯齿鲤。该鱼体长 30厘米（不计尾鳍）。

百度翻译提供：

Piranha pomfret [pygocentrus natteri (Serrasalmus natteri)], also known as piranha, is a kind of fish distributed in the Amazon River in South America and a kind of piranha. There are nearly 56 species of piranhas, belonging to the subfamily of saw salmon and fat carp in the family lipocyprinidae. According to different feeding habits, they can be divided into two types: omnivorous and carnivorous. The carnivorous piranha is named nattereri, the sawtooth carp. The fish is 30cm long (excluding the tail fin).