a deep-bodied South American freshwater fish that typically lives in shoals and has very sharp teeth that are used to tear flesh from prey. It has a reputation as a fearsome predator 锯脂鱼
Serrosalmus and other genera, family Characidae: several species 锯脂鲤属及其他属,脂鲤科:数种
语源
mid 18th cent.: via Portuguese from Tupi pirá 'fish' + pirá 'tooth'