Porites harrisoni is a massive scleractinian coral (family Poritidae) distributed in shallow reef environments of the Indo-Pacific, forming dome-shaped or encrusting colonies with the small, dense corallites typical of the genus. Like other massive Porites species, it plays an important role in reef accretion and carbonate production and is valued as a source of paleoclimatic information from growth band analyses. Genomic data have been generated for this species and are available in public databases, enabling comparative studies of cnidarian evolution and ecology.