Astraeosmilia curvata

Astraeosmilia curvata is a coral species belonging to the family Merulinidae, found primarily in the Indo-West Pacific region. Divers can encounter this coral from Sumatra to Tuvalu, extending north to the Ryukyu Islands and south to New Caledonia. It thrives in tropical waters, typically at depths ranging from the surface down to 40 meters. This coral species often forms small colonies, with corallites that are sometimes compact but more frequently sprawling irregularly. The corallites are distinctly curved at the colony's periphery and average about 8 mm across. The colonies are usually pale brown in color, which can help divers identify them among other coral species. Astraeosmilia curvata is commonly found on flat substrates, often in association with Caulastrea furcata. It also inhabits slopes, lagoons, and inter-reef soft substrates. As members of the class Anthozoa, these corals can be either gonochoric or hermaphroditic. Their mature gametes are released into the coelenteron and then spawned through the mouth. The life cycle includes a planktonic planula larva stage, with metamorphosis beginning with the development of tentacles, septa, and pharynx before the larva settles. The IUCN has assessed Astraeosmilia curvata as being of Least Concern, and it is listed in CITES Appendix II. Divers exploring the coral reefs of the Indo-West Pacific may encounter this coral year-round, offering a glimpse into the diverse ecosystem of these tropical waters.