Brain Coral is also known as Crater Coral or Open Brain due to the inset ridges that create this coral's scalloped rim. A member of the genus Trachyphyllia, the Brain Coral is most often recognized by its luminescent glow under a medium-to-high level of actinic lighting. Open Brain Coral has large polyps with a mantle that can be expanded more than three times the size of its skeleton during the day. Generally this is a nocturnal feeder, producing rows of tentacles to capture prey by the dark of night. You can see the numerous mouths in the colonies valleys at this time. Trachyphyllia are "secondarily free-living", starting off as single attached polyps, annealed to a hard substrate, and later breaking off, mostly found on sand to muddy bottoms... their color varying with depth, turbidity of water. It will sometimes sting adjacent corals, if it can reach them. Requiring a medium water flow, it is perfectly content resting on the bottom of the home aquarium. As with most other members of Large Polyp Stonys, maintaining proper calcium and strontium levels is an important key to successful development. Any zooanthellic food designed for scallops or other filter feeders will also help ensure long-term success and overall health. Approximate Purchase Size: Small: 2" to 3"; Medium: 3" to 4"; Large: 4" to 6"

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