Coeloseris

Genus with one recognised species: Coeloseris mayeri

Colonies are massive, either rounded or hillocky. Corallites are cerioid, without columellae and with neatly arranged (almost Siderastrea-like) septo-costae. Septo-costae are joined at the top of the walls. Tentacles are extended only at night. Colour: Pale green, yellow or brown, usually with darker calices.
Habitat: Shallow upper reef slopes and lagoons.
Abundance: Uncommon.
For more information see: https://coral.aims.gov.au/info/structure-colony.jsp https://coral.aims.gov.au/info/factsheets.jsp