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You've got to be able to see it before you can bite it.

Another article from the the week's Proceedings of the National Academy of Sciences

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Apparently fish evolved eyes that were good for seeing in air before they evolved legs for walking on land.

The theory seems to be that the eyes stuck up out of the water - like a crocodile's - and the fish could see prey that was further away, and sneak up and eat it.

Visual range in air is longer than in water, so they got to see more prey, and eat enough of the extra to beat out the competition.

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Bill Sloman, Sydney
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bill.sloman
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Look at a fish called a mudskipper. Eyes on top, ability to use its fins to 'walk' - or at least squiggle along, partially able to breathe out of water. You can see it where its leading. Given a few more evolutionary pushes, and not too many predators, it will end up as a land dweller.

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Regards, 

Adrian Jansen
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Adrian Jansen
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Paul Hovnanian     mailto:Paul@Hovnanian.com 
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Why are there interstate highways in Hawaii?
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Paul Hovnanian P.E.

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