A. percula interacts with its sea anemone host and other anemonefish species. The symbiotic relationship is well documented to benefit the fish, but equal rewards exist for the anemone. In exchange for protection, A. percula may feed, oxygenate, and remove waste material from its host (Rosenberg and Cruz, 1988). In addition, it may prevent certain coelenterate feeders, such as butterfly fishes, from preying on the anemone (Allen, 1997). Because anemonefishes are highly territorial, A. percula drives away intruders, including those that harm its symbiotic host. Whether these actions are self-serving or altruistic is not known, but both species gain advantage.
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