Intermediate host for guinea worm is Cyclops.
Cyclops are tiny crustaceans of the family Cyclopidae, also called water fleas. They are usually found in stagnant bodies of fresh water such as wells and ponds in poor agricultural communities in rural or periurban areas. In sub-Saharan Africa, India and Yemen they are the intermediate hosts of guinea worm, Dracunculus medinensis, a parasite that causes guinea-worm disease or dracunculiasis. The disease is transmitted to humans when they drink water containing infected cyclops.