This serpentine specimen may look like a large eel, but its six slitlike gills help mark it as a cousin of the great white, the hammerhead, and other sharks.

• 游动时身姿蜿蜒的皱鳃鲨看起来像条大鳗鲡（蛇形鱼类），但它腮部的6道褶皱显示它是大白鲸、锤头鲸和其它鲸鱼是近亲。