Individuals tend to be iridescent apple-green and light blue, and reach a maximal length of 10 cm.

[1] In the Pacific Ocean, they are found in the Gulf of Thailand, Indonesia, the Philippines, China, Taiwan, Japan, the Great Barrier Reef, New Zealand, New Caledonia, Polynesia, Melanesia, and Hawaii in the Indo-Pacific part of the Pacific Ocean.

[1] In the eastern Pacific Ocean, they are found from the Gulf of California south to Peru and the Galapagos Islands.

[2] Phytoplankton, zooplankton, and algae, copepods, and amphipods make up the diet of this fish in the wild.

[1][2] Males feed on unhatched eggs to prevent them from being breeding grounds for microorganisms that can threaten the rest of the clutch.

Some aquarists have successfully bred the blue green chromis in the home aquarium.