Appearance
Adult individuals can grow up to a maximum size of 14 centimetres (5.5 in). Its fins have 17 dorsal spines, 14 to 16 dorsal rays, 2 anal spines, and 14 to 16 anal rays. This fish is gray on the front and white on the back. The top of its dorsal fin and the bottom of its anal fin is black. Some individuals are gray with a yellow horizontal line in the middle.
Distribution
The spiny chromis is found in the western Pacific Ocean. It is found in western and central Indonesia, Papua New Guinea, northern Australia, and all the islands in the Philippines except Luzon. They are also found in Melanesia. This fish usually lives in coral reefs. This fish is found at a depth range of 1 to 65 metres (3.3 to 213.3 ft) but is usually found at a depth range of 4 to 20 metres (13 to 66 ft).Food
This fish is planktonivorous. Younger individuals have been known to eat mucus off the adults.References:
Some text fragments are auto parsed from Wikipedia.
https://en.wikipedia.org/wiki/Acanthochromis_polyacanthus