Why would a leatherback turtle dive 1000m deep?

There are a few theories about why sea turtles make occasional excursions into very deep (> 1000 m) water. These involve escape from predation, thermoregulation, and prey availability. In the first two, sharks are fewer, so turtles can evade predation and “cool off” at the same time. Like ladies tanning on a balcony.

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