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The orange-fin anemonefish (Amphiprion chrysopterus) is a fish belonging to the family Pomacentridae, which includes clownfishes and damselfishes. This fish lives in the Western Pacific north of the Great Barrier Reef between Queensland, Australia, and New Guinea to the Marshall and Tuamotus Islands. It can grow to 17 cm in length.
Like all anemonefishes, this species forms a symbiotic relationship with the sea anemone. This is possible because anemonefish are unaffected by the anemone’s stinging tentacles.
This fish is also a hermaphrodite. It displays a strict, sized-based dominance hierarchy. That is, the female is largest, and the breeding male is second largest. Meanwhile, male non-breeders get progressively smaller as the hierarchy descends. However, the breeding male will change to female if the sole breeding female dies. Then, the largest non-breeder becomes the breeding male.
These colorful fish eat a diet largely consisting of zooplankton.