Sacculina 

Hello friends, welcome to zoology museum, Shri Shivaji Science College, Nagpur. I’m Sacculina, a parasitic barnacle. I infect crabs and take over their bodies. I begin as a tiny larva that attaches to a crab. I grow inside my host, influencing its behavior. I can make my host care for me like it would its eggs. I lack many organs because I don’t need them inside the host. I can sterilize my host to keep it from reproducing. I attach to the crab’s reproductive system and feed off it. Thankyou visit again.