Phylum: Cnidaria
Class: Anthozoa
Order: Corallimorpharia
Family: Discosomatidae (Corallimorphian)

Genus/species: Discosoma spp.

GENERAL CHARACTERISTICS: Generally they are disc shaped with a conical mouth, and the oral disc may be smooth, ribbed, with small or large pseudo tentacles or none at all. Unlike Rhodactus spp., most Discosoma spp. have smooth disc surfaces that lack obvious tentacles, though some may have small or rudimentary tentacles that are visible as rows of knobs. Color and size vary by species.


Diameter up to 8–15 cm (3-6 in)

DISTRIBUTION/HABITAT: Widespread in Indo-Pacific; also common in the Caribbean. Found in tropical coral reefs, typically in dense aggregations.


DIET IN THE WILD: Microcarnivore of plankton; may also possess zooxanthellae.

REPRODUCTION: Sexual and asexual, mostly through budding and pedal laceration. Formation of colonies of clones is common for most species.



Corallimorphs are, as their name implies, very coral-like, but they do not secrete a skeleton.

Discosoma  have many different colors such as blue, red, green and purple and some comes in stripes and spotted pattern,

Aquarists commonly use the generic term Actinodiscus.


California Academy of Sciences Steinhart Aquarium Color on the Reef 2016 AQA16

Ron’s flickr

Aquarium Corals E H Borneman TFH Publications 2001 page 201-3

Ron’s WordPress shortlink

Advanced Aquarist