IsophylliaIsophyllia is a genus of stony coral in the subfamily Mussinae of the family Mussidae.CharacteristicsIsophyllia is a colonial coral. Budding is always intracalicular, occurring inside the oral disc of the polyp, within the whorl of tentacles. The corallites are meandroid, that is, they are linked in a short series of up to five centres. The individual corallites are medium-sized, being in diameter and up to high. There are three or more cycles of septa in each corallite, all equal in size. A narrow costate coenosteum separates the corallites.SpeciesThe World [Register of Marine Species] lists the following species :Isophyllia rigida ''Isophyllia sinuosa''