Anemonefish form mutualistic relationships with the sea anemones they live in and these associations are not random: some species such as the yellow-tail anemonefish (Amphiprion clarkii) are generalists and can live in almost any sea anemone, others like the tomato clownfish (Amphiprion frenatus) are specialists, living in only one sea anemone species, the bubble-tip sea anemone (Entacmaea quadricolor). Reasons for these preferences are unclear because we know very little about the genetic diversity of giant sea anemones.
Scientists reveal new lineages of giant sea anemones in Japan and their surprising associations with anemonefish
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