Crayfish
Catching food:
Crayfish are nocturnal, meaning they do most of their hunting at night. The large "claws" can be used to get large food bits. The first two pairs of their legs have smaller claws to dig worms and other things out of the ground.
Avoiding predators:
When a crayfish is threatened, it will escape by flipping its abdomen and swimming backwards.
Crayfish behave in many ways. When they sense movement or danger, they raise their pincers and arches their back. They also curl their tails under and shoot backwards in the water. The female also curls its tail to protect her eggs. The crayfish also defend their territory by pinching intruders.

Reproduction:
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The male and female mate.
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The female lays about 100 eggs at a time. The female holds the eggs under the swimmerets.
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The eggs hatch in about 2-20 weeks. Small crayfish are born with all the same structures as an adult Crayfish.
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In about 1-2 weeks the crayfish leave its mother's protection after it hatches from the egg. (many baby crayfish are eaten because they are so small)
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The crayfish grows and shed their exoskeleton.
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A crayfish reaches about adult size in 3-4 months and there lifespan is 3-8 years long.
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The crayfish will either mate and start the process over again or they will die