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Re: Great in the air, not so good underwater

On Friday, December 8, 2006, at 12:44 PM, jrc wrote:

As I said, they're not good at it -- but flapping while flying (or ballistic leaping with relatively large 'wings') is clearly compatible with an evolutionary path towards improved flight performance. The eventually problem with that path is of course that they are not presently equipped to remain aerobicly powered during extended flight. Wanna bet that they won't solve it in a few million years (if they survive) ?

Oh, I agree that it is compatible with an evolutionary path towards improved flight; I'm merely saying that they probably aren't actually powered flyers, and hatchetfish might not even be gliders. The enlarged pectoral fins might be utilized for some other function.