Crayfish SZ 4

Crayfish also called crawfish or crawdad are closely related to the lobster. More than half of the more than 500 species occur in North America. Crayfish also live in Europe, New Zealand, East Asia and throughout the world. Nearly all live in freshwater, although a few survive in salt water. Crayfish are characterised by a joined head and thorax, or midsection, and a segmented body, which is sandy yellow, green, or dark brown in colour. The head has a sharp snout, and the eyes are on movable stalks. Crayfish are usually about 7.5 cm long.