A green turtle comes up for air (IMAGE)

Swansea University

A green turtle comes up for air

Caption

Like many air-breathing marine megafauna, green turtles optimise their swim depth during migration to minimise the cost of transport, travelling at around three body-depths beneath the surface in order to avoid creating waves whilst maximising horizontal distance travelled. 

 

Credit

Credit: R. D. and B. S. Kirkby.

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