jellyfish-like creatures

Researchers at the University of Swansea in Britain recently published a study in the British Journal of Experimental Biology with an explanation of the mysterious deep diving behavior of leatherback sea turtles. Sea turtles spend most of their time in shallow surface waters, where they eat and breed, but occasionally they will make a break toward the bottom of the ocean and dive to more than ¾ of a mile below the surface of the water.