Dactylotrochus

Dactylotrochus is a genus of large polyp stony corals from the Red Sea and western Pacific Ocean. It is monotypic with a single species, Dactylotrochus cervicornis. It inhabits the deep sea and is believed to be azooxanthellate.

==Description== Dactylotrochus cervicornis is a sturdy solitary coral with a short pedicel measuring 15 millimeters (0.6 in) in diameter and an encrusting base. The maximum size is in diameter and high. The fossa (central depression) is elongated and the calyx is deep. As the coral grows, certain parts of the corallite wall and septa develop more than others and two or more petal-like lobes grow, often recurving. The septa are very numerous; they are narrow except near the corallite wall and there is no central columella.