How can a lava-eater metabolism explained?

Inspired by A.C.A.C's comment, how can the metabolism of an animal that is harnessing the heat from magma or lava be explained?

I'm thinking of conventional "eating lava or magma", but it could be an unconventional method by absorbing the heat by skin. I'm also thinking whether this method can be used by birds or not. Oh, and don't worry, you can assume the needed parts in contact with the lava/magma are inherently made of fire and heat resistant parts. I read that magma can be as cool as 600 degree Celsius.

For reference you might want to read this question What traits would a species need to survive in magma?, but I still prefer carbon-based lifeform.

The animals won't have to "swim" and live in the magma. They just need to primarily get their energy from the magma/lava.

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posted about 7 years ago

Vylix‭

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