Hi does anyone know anything about Purple Vampire Crabs. Im pretty sure my only pvc is dead. It molted in its water and wasent moving so i moved its outer shell to dry land then very gently touched the pvc it didnt move so i moved it to dry land and it is in the same postion that i put it in. So i think its gone to crabby heaven. But want to know why he died when he was doing so well and seamed healthy.