The researchers studied piranha in a tank ( and got their fingers nipped ) .
研究者们研究了水箱中的食人鱼(这导致他们的手指都冻坏了)。
But in the dry season when ponds and rivers dry up and food becomes more scarce , piranha turn to meat-eating , usually in the form of other fish .
遇上旱季河流和湖泊干涸时,食物变得匮乏,食人鱼就开始吃肉,基本上是吃其他鱼类。
In 2010 , " piranha 3d " was released , allowing for a new generation of audiences to be horrified by the fish .
2010年,影片《食人鱼3d》上映,让新一代的观众们也饱受食人鱼的惊吓。
It required spending more than a month on the amazon in 2001 , subsisting on fried piranha and collecting tissue samples by nicking the aquatic mammals with a crossbow .