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Yeah, that QI clip came to mind when you mentioned it, but to your point the shape that we consider “fish-like” shows up a lot in water. Even whales and dolphins figured out a similar shape, despite them not being fish (though they might still be etymologically related if you go back far enough?)
Ok, I can buy that the shape of a crab is probably optimized for a certain lifestyle.
Yeah, that QI clip came to mind when you mentioned it, but to your point the shape that we consider “fish-like” shows up a lot in water. Even whales and dolphins figured out a similar shape, despite them not being fish (though they might still be etymologically related if you go back far enough?)
Ok, I can buy that the shape of a crab is probably optimized for a certain lifestyle.