In the ocean, then anemone protects clownfish with its toxic tentacles and the clownfish rids the anemone of parasites and feeds it with fish poo. Is it commensalism, mutualism, parasitism, or predation?

The relationship between anemone and clownfish is a mutualistic relationship. Mutualism is a type of symbiotic relationship where both species benefit from each other. In this case, the anemone provides protection for the clownfish with its toxic tentacles, and in return, the clownfish helps rid the anemone of parasites and also provides it with nutrients from its waste (fish poo). Both species gain advantages from this interaction.