Crayfish Phylum Arthropoda Class Crustacea Appearance:

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Presentation transcript:

Crayfish Phylum Arthropoda Class Crustacea Appearance: ~ 7.5 cm (3 in.) long 500 sp in N. Amer. Decapods = 10 legs Exoskeleton = shed w/growth (molting) Looks like small lobster

Omnivorous scavengers Dig burrows Behavior: Most active at night Omnivorous scavengers Dig burrows Most FW, some SW Food in Louisiana, Kentucky, etc

Morphology of a crayfish: edible freshwater crustacean, with pincers on the two forelegs. Claw: ends of the largest of a crayfish limbs. Rostrum: extension of a crayfish's shell. Head: foremost part of a crayfish. Thorax: upper part of a crayfish's body. Abdomen: lower part of a crayfish's body. Exopodite: external part of the uropod. Endopodite: internal part of the uropod. Uropod: swimming appendage of the crayfish. Telson: last segment of the abdomen of a crayfish. Segment: ring of the abdomen of a crayfish. Walking leg: limb of a crayfish used for forward motion. Coumpond eye (stalked eye): complex sight organ of a crayfish. Antennule: small antenna. Cheliped: front leg which ends in pincers. Antenna: organ of touch of a crayfish.