They know that they have to use the proper ingredients in the correct proportions to make the dish turn out as intended. Chefs and home cooks appreciate a tried-and-true recipe. Sexual maturity is achieved in a few months to several years, and the life span ranges from 1 to 20 years, depending on the species.You can’t just throw anything into a pot and expect it to taste good. The larvae remain on the mother for several weeks. The eggs, attached to the female’s abdomen, hatch in five to eight weeks. Crayfish mate in the autumn and lay eggs in the spring. They are most active at night, when they feed largely on snails, insect larvae, worms, and amphibian tadpoles some eat vegetation. Among the largest is Asta copsis gouldi of Tasmania, which may reach 40 cm in length and weigh about 3.5 kg (8 pounds).Ĭrayfish, common in streams and lakes, often conceal themselves under rocks or logs. Among the smallest is the 2.5-cm-long Cambarellus diminutus of the southeastern United States. Most adult crayfish are about 7.5 cm (3 inches) long. There are five pairs of smaller appendages on the abdomen, used mostly for swimming and circulating water for respiration. The front pair of the five pairs of legs have large, powerful pincers (chelae). The exoskeleton, or body covering, is thin but tough. The head has a sharp snout, and the compound eyes are on movable stalks.
Nearly all live in fresh water, although a few species occur in brackish water or salt water.Ĭrayfish are characterized by a joined head and thorax, or midsection, and a segmented body, which is sandy yellow, green, red, or dark brown in colour. Over half of the more than 500 species occur in North America.
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