Juveniles and adults have a white head band, which is wide and starts behind the eye, which may gave a blue tint.

[7] A. melanopus is widely distributed in the western Pacific, from the Great Barrier Reef north to the Marshall Islands and Guam, New Guinea and from Vanuatu and New Caledonia to eastern Indonesia.

It was previously thought to be present in Fiji, Tonga, and the Samoan Islands, however that fish has now been described as a separate species, A.

[7] The relationship between anemonefish and their host sea anemones is not random and instead is highly nested in structure.

[10] Anemonefish and their host anemones are found on coral reefs and face similar environmental issues.

Like corals, anemone's contain intracellular endosymbionts, zooxanthellae, and can suffer from bleaching due to triggers such as increased water temperature or acidification.