Sperm whales dive to depths of nearly 2,250 metres on a single breath, their heads packed with a waxy oil called spermaceti that solidifies under cold pressure and helps them sink like a stone toward prey they hunt in total darkness
Sperm whales routinely dive nearly 2,250 metres on a single breath, using a head packed with waxy spermaceti oil that solidifies under cold and pressure to help drag them toward squid they hunt in total darkness.