Neopomacentrus cyanomos, commonly known as the regal demoiselle, is a fish native to the Indo-Pacific region from the Persian Gulf, the Red Sea and the coastal waters of east Africa east to the Philippines, north to southern Japan, south to northern Australia and Melanesia.

[1] It has also been found as an invasive species in the Gulf of Mexico, off the Yucatan Peninsula, although how they arrived there is unknown.

[2]

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