Characters: Colonies are massive, flat or consisting of flat-topped columns. The coenosteum between corallites is granulated giving a rough appearance which can be seen underwater.
Colour: Grey or tan.
Similar Species: Porites lichen, which has thick walls and a tendency for corallites to form valleys. Corallites are similar to those of P. australiensis.
Habitat: Shallow reef environments.
Abundance: Common.
Taxonomic References: Scheer and Pillai (1983); Veron (2000a);
Identification Guides: Sheppard and Sheppard (1991);