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Prawns swim by moving the legs in the body segments behind their thorax. These legs are called pleopods or 'swimmerets' and prawns and shrimp can swim forwards or backwards easily by moving them in the water.


Prawns and shrimp can also mov e by a motion called 'lobstering' where they flick their tails and use the 'uropods' and 'telson' at the last body segment as a big paddle in the water to move very very rapidly backwards.


See: http://jumboprawn.com for pictures of all the prawn legs and body segments.

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