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Sperm whales sleep vertically in silent pods near the ocean surface, drifting head-up in synchronized clusters for roughly ten to fifteen minutes at a time — the only mammal known to sleep this way, and the behaviour was not filmed until 2008
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Silicon Canals
A sperm whale sleeps standing up.
A sperm whale’s head is enormous and packed with spermaceti, a waxy oil once hunted for candles and lamp fuel.
Researchers found that sleeping sperm whales actively release small bursts of gas from their blowholes while suspended, essentially deflating themselves to keep their heads from bobbing to the surface.
Sperm whales seem to be different.
The shape of a sleeping podFrom a small boat, a sleeping sperm whale pod looks like something has gone wrong.