What is Mutualism, and what Situation does it Create?

-Mutualism is where Both Organisms can Benefit from each other, therefore not Harming, but Bettering each other. Example: -Clownfish lives in the Toxic Tentacles of Sea Anemones, and is the only Fish that can do so, making them Protected, and the Clownfish helps, by Eating Parasites that would harm the Sea Anemones