Crayfish, which are freshwater crustaceans closely related to lobsters, have large claws with which they threaten predators and protect themselves. In addition, when crayfish are frightened, they make menacing gestures with their claws, propel themselves backwards and use their tails to throw mud at their enemies.Continue Reading
Unlike lobsters, which live in saltwater seas and oceans, crayfish inhabit lakes, rivers and streams. They are also smaller than lobsters, usually only about 2 to 6 inches in length. They use the rocks, logs or muddy bottoms of their freshwater habitats to hide themselves from potential predators. When water levels are low, crayfish burrow into the mud. At night, they come out to feed on mollusks, insects, worms, snails, tadpoles and aquatic vegetation.
Crayfish are hunted by numerous predators in the wild, including raccoons, foxes, snakes, turtles and birds. Humans hunt crayfish for food, bait for fishing and to display as pets in aquariums. Crayfish are considered a delicacy in many parts of the world, but normally, only the tails are eaten. Fishermen use crayfish to catch such species of fish as bass, pike and catfish. Crayfish thrive in freshwater aquariums, and if they are fed properly, they are non-aggressive and can co-exist with various species of fish.Learn more about Marine Life
Crayfish have five pairs of legs, for a total of 10. Four of these pairs are considered "walking legs," while the fifth pair are the "chelipeds" or pinchers.Full Answer >
Crayfish have a two-part stomach, with each stomach breaking apart food in a different manner. They also possess a digestive gland, sometimes called a liver, and an intestine that finishes the digestive process and excretes waste as the organ travels from the second stomach to the anus.Full Answer >
Crayfish swimmerets are appendages on the ventral side of the crawfish's abdomen. The pair that is closest to the abdomen shows the sex of the crayfish.Full Answer >
Crayfish move underwater by fluttering small appendages, called swimmerets; but, they can also use their legs to walk on land or on the floor of various bodies of water. Swimmerets are located underneath the tail and can be used to clutch eggs.Full Answer >