|MadSci Network: Evolution|
Some creatures, such as fish, which live underground, are eyeless. I can understand how, for instance, snakes would evolve from burrowing lizards, leglessness being advantageous. But how about those fish? I would have thought eyes would become irrelevant as the fish adapted to life in darkness. Better touch or smell would help an individual to survive and breed, but what difference would it make if that individual had normal eyes, bad eyes, or even none. OK, eyeless individuals would be at no disadvantage and would survive, but why would the whole population become eyeless?
Re: How does natural selection apply to loss of organs or faculties?
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