Symbiosis
interaction between two different living organisms
Mutualism
An interaction that is beneficial to both organisms involved
Example
The clownfish has a safe place to live and the sea anemones are saved by the clownfish from being eaten by their predators, the butterfly fish.
Commensalism
An association between two organisms in which one benefits and the other derives neither benefit nor harm
Example
Whales and Barnicles
Parasitism
A non-mutual symbiotic relationship between species, where one species, the parasite, benefits at the expense of the other, the host.
Example
Fleas and Mosquitos feed on the blood of other organisms for its benfits