Why do crayfish crawl out of the water (found one on the road) and how do they survive out
of water?
by 
swede
ANSWERS: 2
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They crawl out in search of food, or deeper water. They survive the same way a crab does. They can breathe air and breathe under water.
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"Crayfish are most active at night. They leave the protection of the rocks or other cover to forage in the dark, no doubt aided by their long, sensitive antennae. They can even crawl up onto land next to water to go from pool to pool in search of food or to forage along the shore. The location of their gills under the carapace means that they stay moist for some time even when the crayfish is out of the water. This and the crayfish's ability to tolerate low oxygen levels allows them to venture from the water for short periods. If encountered on land by a predator, or a pesky photographer, they adopt a defensive stance with claws at the ready." Source and further information: http://www.naturenorth.com/fall/crayfish/cray2.htm Further information: http://www.answerbag.com/a_view/91593
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