How is crayfish adapted to living in the aquatic environment?

The crayfish lives in fresh waters, it has a color with which it is easily camouflaged at the bottom of the reservoir among snags and silt. The shell is dense and protects the internal organs. The senses are well developed. These are compound eyes, located on the stalks, helping to seek food. Long antennae are the organ of touch and short antennae help to find food and evaluate it. The body of a crayfish has a caudal fin for swimming in water and 5 pairs of limbs for movement on land or at the bottom of a reservoir. Cancer can move forward and backward.