鲨鱼嗅觉可能是动物界中最灵敏的, 可以在100 mile以外嗅到猎物.
它们对自己baby的气味还是很敏感的. 下次你在海里游泳小心它妈妈把你吃了. 你就是去Hawaii 去也不行. South pole or North Pole are OK fro you to swim now. Sharks do not go those places as they are too cold.