Q:

How do crayfish move?

A:

Quick 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.

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Full Answer

Crayfish physically resemble lobsters and live in freshwater. The crayfish is an opportunistic feeder, preying on smaller, slower animals it can catch or scavenging off of dead ones. Plants are also included in its diet. Most species of crayfish are found in North America, with a population of more than 330 species. The crayfish is an important part of cuisine worldwide, and it is also commonly used as fishing bait. In certain areas, such as the United Kingdom, some species of crayfish are considered invasive, because they threaten local ecosystems.

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Related Questions

  • Q:

    What is a crayfish exoskeleton?

    A:

    A crayfish exoskeleton is the tough external material, made from chitin and calcium carbonate, that surrounds, supports and protects a crayfish's body. The exoskeleton also protects the crayfish through times of drought, allowing the animal to locate another source of water.

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  • Q:

    Why do crayfish molt?

    A:

    Crayfish molt because they must shed their hard exoskeletons and grow new, larger ones as their size increases. During the first year of life, a crayfish molts six to 10 times. This number decreases to three to five times during its second year.

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  • Q:

    What is the telson on a crayfish?

    A:

    The telson of a crayfish is the center segment of the arthropod's tail, which is the furthest back extension of the abdomen. The telson, in conjunction with the other segments of the tail, aids the creature in locomotion through water.

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  • Q:

    How do crayfish protect themselves?

    A:

    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.

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