Mosquitoes carry the larva of the heartworm. Their bit may infect a dog. The heartworm larvae infect the dog's heart, where they may live for some time before killing the dog. Barnacles have no means of locomotion and may reside on the skin of a whale. The whale is unaware that the barnacles are there, but the barnacles get a free ride from place to place.
Ringworm is really a type of fungus that causes a ring-shaped itchy place on the skin of humans.
The fungus obtains food from human skin, and the human can become quite miserable. Bromeliads grow in the canopy of the tropical rain forest. They live in the tops of trees to obtain sunlight. They do not obtain nourishment from the tree or harm the tree. SuccessLink needs to know.