Neoglyphidodon polyacanthus is a species of damselfish of the family Pomacentridae.

This species of fish is found in the aquarium trade.

This species of fish is found in reefs in the western Pacific Ocean.

[1] They are found in areas of the western Pacific Ocean from the southern Great Barrier Reef in Australia and New Caledonia.

Juveniles are yellow with blue lines extending from the eye to their eyespot.