Hammerhead sharks 'hold their breath' when deep diving up to 2,500 feet to avoid freezing to death

Hammerhead sharks 'hold their breath' when deep diving up to 2,500 feet to avoid freezing to death

A video caught at in deep sea shows a hammerhead shark. Its gills look almost invisible as it holds its breath.Alec B.M. Moore and Andrew R. Gates (2015). Deep-water observation of scalloped hammerhe… [+5553 chars]

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