Why do crabs walk sideways?

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Offline DoctorBeaver

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Why do crabs walk sideways?
« on: 09/07/2007 20:07:41 »
Advantageous characteristics evolve, disadvantageous ones die out. So what advantage does walking sideways give crabs? How did that evolve?

And are there any other animals that perambulate in such a manner?
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Offline JimBob

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Why do crabs walk sideways?
« Reply #1 on: 09/07/2007 23:56:37 »
Do you remember the song "crabs walk sideways and lobsters walk straight ... ?"

Both are crustaceans, and there is a huge number of shrimp that also walk straight so I doubt there is much advantage. But the only advantage I can think of is the surprise it gives to predators that normally pray on "straight" walking critters.

The mind is like a parachute. It works best when open.  -- A. Einstein

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Offline DoctorBeaver

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Why do crabs walk sideways?
« Reply #2 on: 10/07/2007 00:01:37 »
That's better than anything I can think of.
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paul.fr

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Why do crabs walk sideways?
« Reply #3 on: 10/07/2007 07:07:41 »
I refer the honerable gentleman, to a question previously aske.
http://www.thenakedscientists.com/forum/index.php?topic=6635.0

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Offline DoctorBeaver

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Why do crabs walk sideways?
« Reply #4 on: 10/07/2007 09:32:14 »
Thanks Paul, I hadn't seen that thread; or, at least, I don't remember having seen it. It explains the mechanics but not the why.
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paul.fr

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Why do crabs walk sideways?
« Reply #5 on: 10/07/2007 11:52:31 »
Thanks Paul, I hadn't seen that thread; or, at least, I don't remember having seen it. It explains the mechanics but not the why.
if only i knew why, the story of my life...why, why why