U.S. Distribution According to both the IUCN Species Account and the CITES species database, Cyphastrea agassizi occurs in the Northern Mariana Islands. The IUCN Species Accounts also lists it for the U.S. minor outlying islands, and the CITES

Characteristics Colonies of Cyphastrea agassizi are massive, with deeply grooved surfaces, widely-spaced corallites, and a smooth coenosteum. Septae are in three unequal orders, with the first order exsert. May have irregular groove/tubercle formations (Veron, 2000). Colonies are usually only a few inches in diameter (Fenner, 2005). Colonies have a whitish coenosteum, with pale brown or green corallites. Septae are sometimes orange (Veron, 2000). Taxonomy Taxonomic issues: None. Cyphastrea agassizi is similar to Cyphastrea ocellina which has smaller, more crowded corallites. Superficially resembles Cyphastrea japonica and Leptastrea inaequalis (which has crowded corallites with thicker walls) (Veron, 2000). Family: Faviidae. Evolutionary and geologic history: The genus Cyphastre is known from the Oligocene Epoch from the Tethys Sea and West Indies, but is extinct in those locations (Wells and Moore, 1956). Global Distribution Found primarily in the Indo-Pacific, including Australia, Indonesia, Fiji, Japan, Hawai`i, and the Solomon Islands. Cyphastrea agassizi is also found in Bikini Atoll (Richards et al., 2008a).