Crayfish Free Essay, Term Paper and Book Report
Crayfish
Crayfish, also called crawfish or crawdad, are closely related to the lobster. More than half of the 500 species are found in North America, mostly in Kentucky (Mammoth Cave) and Louisiana in the Mississippi basin. Crayfish also live in Europe, New Zealand, and East Asia and throughout the world, including the Tristan da Cunha Islands. Almost all crayfish live in freshwater, although a few survive in salt water.
Crayfish are characterized by a joined head and thorax, which is sandy yellow, green, or dark brown. Juvenile crawfish are light tan, but adults are deep red. Their color also depends on diet. The head has a sharp snout, and the eyes are on movable stalks. The crayfish has 8 jointed walking legs, a segmented body, 2 pairs of sensory antennae, and compound eyes. It has 2 large pincers or claws called chelipeds. These strong pinchers are specialized for cutting, capturing food, attack, and defense. If a crayfish loses a leg, the leg will regenerate (re-grow). The head and thorax are fused, forming the cephalothorax. Using gills, a crayfish breathes oxygen th......
Word Count: 587
Page Count: 2.3 (250 words a page / double spaced)
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