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Clownfish are small, brightly colored fish that inhabit coral reefs in tropical waters around the world. They have a unique symbiotic relationship with sea anemones, using them for protection from predators while providing food and shelter for the anemone. Clownfish are able to swim among the anemone's tentacles without being stung due to a mucus coating on their skin that makes them immune to the anemone's venom. They come in a variety of colors and patterns, with distinct differences between species. In addition to their importance as indicators of reef health, clownfish play a crucial role in the reproduction of sea anemones.