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flag Marine animals save energy by swimming at depths of about three body lengths, a new study finds.

flag Researchers from Swansea and Deakin Universities found that marine animals, including mammals, birds, and reptiles, swim at similar relative depths when traveling to save energy. flag By swimming about three body lengths deep, they minimize wave formation and reduce vertical movement, conserving energy for long-distance migrations. flag This study, published in PNAS, analyzed data from six institutes across five countries.

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