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Q&A How can a warm-blooded creature with external gills avoid heat loss in the sea?

I'd like an alien to be warm-blooded, but have external gills. Imagine a kind of giant crab or woodlouse (pillbug) which spends part of its time on land and part of the time in the sea. However, ex...

4 answers  ·  posted 7y ago by DrBob‭  ·  last activity 7y ago by DrBob‭

Question biology science-fiction xenobiology