With a mouthful of three-pointed teeth, the frilled shark may be a fearsome hunter, but it's considered harmless to humans. 满口的三角牙证明皱鳃鲨是凶猛的捕食者，但科学家认为它不会攻击人类。
Believed to have changed little since prehistoric times, the frilled shark is linked to long-extinct species by its slinky shape and by an upper jaw that is part of its skull. 科学家认为，皱鳃鲨自史前时期以来在外貌上的变化几乎很少。
