Description: Colonies are hemispherical, less than 0.15 metres across, with an even surface.
Color: Cream, grey or brown.
Habitat: Back reef margins.
Abundance: Sometimes common.
Similar Species: Porites echinulata, which has more widely spaced corallites and a columnar growth-form. The deeply excavated calices of P. densa are readily recognisable underwater. See also P. echinulata and Poritipora paliformis which have corallites of similar size.