Some of the sharks caught by deep-sea fishing boats are actually incidental to their main catch. Sharks hunt smaller fish to eat, so that just like dolphins which love to play around shoals of fish, they are often caught in the nets along with them, as a "bycatch."
有一些遠洋漁船捕獲的鯊魚，學者將之稱為「混獲」，即鯊魚並非主要捕捉魚種，但鯊魚為了捕食其他小魚，就和愛與魚群嬉戲的海豚一樣，常跟著進了魚網。