Sperm Whales "Regularly" Toot Gas To Hang Motionless In The Ocean While They Sleep
Studies on dolphins and porpoises have shown that some cetaceans – the group that includes whales and dolphins – sleep with one side of their brain at a time, something known as unihemispheric sleep. This allows them to continue moving and breathing while underwater. We think it likely that they are sleeping with both sides of their brain. Patrick Miller But less is known about how other, larger whales sleep. Some have been observed engaging in a motionless, drifting behavior, yet the sperm whale's habit of sleeping vertically with its head pointed to the surface is unique. According to Professor Patrick Miller at the University of St Andrews in Scotland, this is due to their unusual heads. “Sperm whales are named for their large ‘spermaceti’ oil that is located in their heads,” explained Miller to IFLScience. “Because the oils are lighter (less dense) than other parts of the body, this causes sperm whales to passively rotate to the iconic head-up posture that we can see in photographs and observe using animal-attached tags.” The secret of sperm whale sleep The giant sperm whales can hang motionless in the water for up to 20 minutes at a time during these dives. But...
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