Home|Search|Identify|Taxonomic tree|Quiz|About this site|Feedback
Developed by ETI BioInformatics
Characteristics, distribution and ecology
Taxonomische classification
Synonyms and common names
Literature references
Images, audio and video
Links to other Web sites

Ten-ray star coral
Madracis decactis
(Lyman, 1859)

Shallow water colonies up to 15 cm in diameter with short clubbed branches of 2-3 cm in diameter. In deeper water, the species forms encrusting colonies, sometimes with hillocks or lobes.


Corallites separated, 1.3-1.9 mm in diameter, usually with ten septa per corallite. Columella massive, styliform.

Generally present above 20 m, but more common below 30 m.

Some other species of the genus occur on Curacao: Madracis formosa , Madracis mirabilis , Madracis pharensis , Madracis senaria and a recent described species, Madracis carmabi . Recent investigations suggest that M. senaria and M. mirablis form monophyletic groups, while M. formosa , M. pharensis and M. decactis form a species-complex. It seems that hybridization occurs between the M. pharensis / M. decactis -complex and M. formosa and polyphenism within the M. pharensis / M. decactis -complex.

Ten-ray star coral (Madracis decactis)