Q:

What phylum do crayfish belong to?

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Quick Answer

Crayfish, also known as crawdads or crawfish, belong to the phylum Arthropoda and the subphylum Crustacea. Like other members of their phylum, crayfish have external skeletons made of chitin, a circulatory system that lacks dedicated blood vessels and a simplified nervous system similar to that found in worms.

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Full Answer

Crustaceans are distinguished from other members of their phylum by their adaptations for life in water. Other arthropods, such as insects, have book lungs or tracheae; but crustaceans, including crayfish, have gills. Crayfish resemble small lobsters, and both crayfish and lobsters belong to Decapoda, a group within Arthropoda that consists of animals with five legs and 20 body segments.

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Related Questions

  • Q:

    What are the answers to the crayfish worksheet?

    A:

    The answers to the crayfish worksheet are the anatomy of the common crayfish. Specifically, they are the antennae, the antennules, the chelipeds, the eyes, the cephalothorax, the walking legs, the abdomen, the swimmerets and the telson/uropods. Those are the basic body parts of the common crayfish.

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  • Q:

    How do you tell male and female crayfish apart?

    A:

    To tell male and female crayfish apart, turn them upside down; the male has two tiny extra leg-like protrusions behind the last set of legs. It is safe to have the crayfish out of water for a short time to determine this.

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  • Q:

    What are the appendages on the abdomen of a crayfish?

    A:

    The appendages on the abdomen of the crayfish are called pleopods and uropods. The abdomen has six segments, and the ventral side of the first five segments each have a pair of pleopods or swimmerets. A pair of uropods are present in the sixth segment.

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  • Q:

    How do you build a crayfish trap?

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    To build a crayfish trap, fold one piece of hardware cloth into a cylinder and two additional pieces into funnels, attach the funnels to the ends of the cylinders so that the points face one another, and finally cut an opening in the cylinder to make a door. To use the trap, bait it with chunks of hot dog or fish, and place it in a body of water where crayfish live.

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