Acropora gemmifera is a species of acroporid coral found in the Gulf of Aden, the Red Sea, the central Indo-Pacific, the southwest and northern Indian Ocean, southeastern Asia, Australia, the East China Sea, Japan, the oceanic central and western Pacific Ocean, and northwestern Hawaiʻi.

It occurs on exposed upper reef flats and slopes, from depths of 1–15 m. It was described by Brook in 1892.

It occurs in digitate colonies consisting of thick tapering branches.

[2] It is classed as a least concern species on the IUCN Red List, but it is thought that its population is decreasing in line with global coral decline, and it is listed under Appendix II of CITES.

Figures of its population are unknown, but is likely to be threatened by the global reduction of coral reefs, the increase of temperature causing coral bleaching, climate change, human activity, the crown-of-thorns starfish (Acanthaster planci) and disease.