Commensalism is a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed.
Some examples include:
Anemonefishes or clownfishes - clownfish live among the tentacles of the anemones which protects them from predators. Predators are poisoned by the anemone.
Atlantic puffin - The puffins use burrows for nesting that were made by rabbits.
Mites - Mites will attach to wasps, flies or beetles for transportation.
