But what is the advantage to the anemone? There are several. First, the brightly colored clownfish attracts predators. When the clownfish swims under the anemone's tentacles to safety, if the predator follows, the anemone has the chance to sting and eat it. Other services the clownfish performs are cleaning up food scraps and dead anemone tentacles, and chasing away fish that might eat the anemone.