Colonies are usually hemispherical or helmet-shaped and may be over 4 metres across. They commonly form ?micro-atolls? in intertidal habitats. The surface is usually smooth.
Usually cream or pale brown but may be bright blue, purple or green in shallow water.
Frequently a dominant species of back reef margins, lagoons and some fringing reefs.
Probably the most common Porites.
Taxonomic note: This species is divisible into several smaller semi-distinct taxonomic units. Source reference: Veron (2000). Taxonomic references: Wells (1954), Veron and Pichon (1982). Additional identification guides: Veron (1986), Sheppard and Sheppard (1991), Nishihira and Veron (1995).
displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Porites lobata.Great Barrier Reef, Australia.This species commonly forms helmet-shaped colonies with lobed upper surfaces.Peter Isdale.