Colonies are flat or submassive. Corallites are submeandroid to cerioid. Walls are thin and septa have irregularly fused margins. Septa are widely spaced and uniform, giving the colony surface a neat appearance. Tentacles are usually at least partly extended during the day.
Bluish-grey or cream. Polyps are dark brown.
Turbid environments at the base of reefs and in intertidal pools.
Common in south-east Africa, uncommon elsewhere.
Taxonomic note: There are substantial differences between north-west and south-west Indian Ocean occurrences of this species. Source reference: Veron (2000). Taxonomic reference: von Marenzeller?s original description/specimens. Additional identification guides: Sheppard and Sheppard (1991), Coles (1996), Carpenter et al. (1997).
displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Anomastraea irregularis.Oman.A massive colony at the bottom of a reef slope.Richard Keech.
Anomastraea irregularis.South Africa.A massive colony in an intertidal rock pool.Michael Schleyer.