Rough Star Coral

Isophyllia rigida

Rough star coral is a reef-associated species found in the Western Central Atlantic, from the Caribbean Sea to Bermuda and as far south as Venezuela. It also inhabits waters in the Northwest Atlantic, including the USA and Canada. Divers can typically encounter this coral at depths ranging from 0 to 35 meters, with most occurrences shallower than 20 meters. The coral's appearance is characterized by its massive and cerioid formation, often displaying a mottled gray-green color with contrasting walls and valleys. Thin septa with pointed fine teeth and rudimentary columellae are notable features. This coral is zooxanthellate, meaning it has a symbiotic relationship with photosynthetic algae. It thrives in various reef environments, particularly in surge channels. In terms of reproduction, members of its class, Anthozoa, can be either gonochoric or hermaphroditic. They release mature gametes into the coelenteron, which are then spawned through the mouth. The zygote develops into a planktonic planula larva, undergoing metamorphosis before settling. The Rough star coral is listed as Least Concern on the IUCN Red List. For divers, encountering this coral offers a chance to observe its unique morphology and coloration, which can be a highlight of exploring reef environments.