Shrimps swim backward by rapidly flexing the abdomen.... shrimp, shrimp

The common European shrimp, or sand shrimp, Crangon vulgaris ( Crago septemspinosus ), occurs in coastal waters on both sides of the North Atlantic and grows to about 8 centimetres (3 inches); it is gray or dark brown with brown or reddish spots. The shrimp Peneus setiferus feeds on small plants and animals in coastal waters from North Carolina to Mexico; it attains lengths of 18 cm (7 in.). Crangon vulgaris and Peneus setiferus are commercially important, as are the brown-grooved shrimp ( P. Xiphocaris lives in freshwaters of West Indian islands, and the edible river shrimps or prawns of the genus Macrobrachium ( Palaemon ) are found in most tropical countries. The pistol shrimp, Alpheus, which grows to 3.5 cm (1.4 in.), stuns prey by snapping together the fingers of the large chelae, or pincers. The fishes signal warnings of danger to the shrimp by body movements. The coral shrimp, Stenopus hispidus, a tropical species that attains lengths of 3.5 cm (1.4 in.), cleans the s! cales of coral fish as the fish swims backward through the shrimp's chelae. shrimp, shrimp