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shared by Dinah M. on 07 Jan 13 - No Cached

How Fish Evolved to Climb Waterfalls With Their Mouths
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uses suckers in its mouth and belly to move up steep cliffs in its rugged Hawaiian habitat.
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Because its freshwater habitat is easily disturbed—by a big storm, for instance—the fish often crawl up waterfalls to return upstream.
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fish uses the same movements to climb as it does to eat algae.
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The Nopili rock-climbing goby has two suckers for climbing.
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This suggests that, at some point in its evolution, the Nopili rock-climbing goby repurposed one behavior for another
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There the scientists filmed them feeding on algae-covered glass and—stimulated by falling water—climbing.
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the team concluded that the fish uses the same overall movements
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Though it's still unknown which behavior came first, the end result is a perfectly adapted fish
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