Amphiprion chagosensis, the Chagos anemonefish, is a marine fish belonging to the family Pomacentridae, the clownfishes and damselfishes.

[3] Clownfish are small-sized, 10–18 centimetres (3.9–7.1 in), and depending on species, they are overall yellow, orange, or a reddish or blackish color, and many show white bars or patches.

Within species, there may be color variations, most commonly according to distribution, but also based on sex, age and host anemone.

Clownfish are found in warmer waters of the Indian and Pacific oceans and the Red Sea in sheltered reefs or in shallow lagoons.

The Chagos anemonefish is mainly distinguished by location, with similar species mostly having a geographic separation, with A. akindynos being found on the Great Barrier Reef and Coral Sea and A. allardi in East Africa.