External features of Penaeus
Cephalothorax antennule antenna antennal flagellum scaphocerite carapace maxilliped pereopods compound eye rostrum Abdomen pleopods abdominal segments Tail uropods telson
	Shrimp have 5 pairs of pleopods. The endopods of first two pleopods are always sexually dimorphic, being modified in the male into the petasma and appendix masculine. The other pleopods are similar in size and structure. The pleopods beat rhythmically to give forward swimming, during which the pereopods are folded up underneath the body (Dall et al., 1990).