put them in a rectangular fish tank, they can only move sideways if they wanna maintain eye contact and still get away right?
alan-
its like men walks straight naturally. probably its just how god created it.
TooFree
Finally, google it.
Because that's the way their legs bend. Muscles work in pairs. A muscle can only retract, or pull; to lengthen again it must relax and be pulled back by another 'antagonistic' muscle. This may lets them squeeze into holes and crevices to keep out of the way of fish with sharp teeth and larger crabs that might think the crab was a tasty meal.
-- Mystery Solved --
axle-ken
haha i dun care hw they walk, i just love their taste in black pepper, cerel, butter, chilli and wat ever can be cook with it