Acanthastrea rotundoflora

Acanthastrea rotundoflora is a zooxanthellate species of coral.^[2] It obtains most of its nutritional needs from the symbiotic dinoflagellates that live inside its soft tissues. These photosynthetic organisms provide the coral with organic carbon and nitrogen, sometimes providing up to 90% of their host's energy needs for metabolism and growth. Its remaining needs are met by the planktonic organisms caught by the tentacles of the polyps.^[4]

This coral has a wide range and is moderately common. It is less susceptible to coral bleaching than some related species because it occurs in deeper water. The population trend for this species is unclear, but the main threats faced by corals in general are related to climate change and the mechanical destruction of their coral reef habitats; increasing damage from extreme weather events, rising sea water temperatures and ocean acidification. The International Union for Conservation of Nature has assessed the conservation status of this species as being a "Least concern species". All corals receive protection by being listed on CITES Appendix II.^[1]