Characters: Colonies are free-living, delicate, thin walled domes, commonly over 0.6 metres across. Septo-costae radiate from a central corallite or are perpendicular to the colony margin. There is usually a well defined line of demarcation where groups of septa meet. Septal teeth are tall.
Colour: Dark brown.
Similar Species: Halomitra clavator.
Habitat: Deep protected environments.
Abundance: Usually uncommon, but distinctive.
Taxonomic Note: The type species of Zoopilus Dana, 1846. Very distinct species.
Taxonomic References: Veron and Pichon (1980); Hoeksema (1989a); Veron (2000a);
Identification Guides: Veron (1986a); Nishihira and Veron (1995); Turak and DeVantier (2011b);
