Interrelationships
Mutualism
In this kind of symbiotic relationship both organisms benefit. An example of this is when the clownfish and the anemone live together the anemone gets some of the food that the clownfish doesn't eat, and the clownfish keeps away things that try to eat the anemone. Both of these organisms depend on each other for survival.
Commensalism
In this kind of symbiotic relationship the one organism benefits while the other is unaffected. An example of this is when a bird lives in a tree and the tree doesn't recieve anything from the bird nest/family. The bird benefits from this by being away from predators on the ground and having shelter against wind and rain.
Parasitism
In this symbiotic relationship one organism is harmed while the other is benefited from the other. An example of this is when a tapeworm goes inside it's host, the host is harmed. The harm is often stomach pain and sometimes disease. Organisms are effected greatly by tapeworms and the tapeworms benefit from being inside other organisms.