on that shrimp it seems to be a SHRIMP TUMOR ISOPOD the isopod are blood suckers that parasitize shrimp.These isopods appear as ,large otfen whitish, lumps on the side of a shrimp.they are difficult or impossible to remove. it attaches to the upper part of the shrimps's legs under the ccarapace, thenalters in shape to grow over them. subsequent isopods turn into smallmales fasten to the female as the female grows, sucking the blood of the host, she loses most of her pill-bug shape and grows into a large white mass the may render its host sterile. as the host shrimp grows, the isopod molts along with it and grows well. the original infectionoccurs through an intermediate host not found in captivity; a tumor isopod on a shrimp WILL NOT INFECT OTHER SHRIMPS IN THE AQUARIUM.THIS IS FROM THE POCKETEXPERT GUIDE MARINE INVERTEBRATES BY RONALD L. SHIMEK ON PAGE 234 ITS A GOOD BOOK CHECK IT OUT
