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[Hawkeye]

Just a little query from those who know about turtles.

I was reviewing some underwater video I took of a large turtle in Forster sleeping under a rock. Just thinking afterwards how does a turtle maintain body temperature when it is immersed in water for large periods of time and can be immobile sleeping (ie no muscle activity). I know that reducing its metabolism allows it to stay underwater for ages but how then does it gain enough temperature to ge around?

Cheers Hawkeye