Open Brain Coral Care Guide
Trachyphyllia geoffroyi · Saltwater LPS Coral
What Open Brain Coral look like
Trachyphyllia geoffroyi, commonly known as Open Brain Coral, exhibits a distinctive morphology characterized by its large, fleshy, and lobed structure. The coral can reach a maximum diameter of up to 12 inches (30 cm) in mature specimens. Its polyps are large and extend significantly during the night, displaying a range of vibrant colors including greens, browns, and purples, often with contrasting patterns. The skeletal structure is robust, with a prominent, ridged surface that enhances its defensive adaptations against predation. This species lacks significant sexual dimorphism, though variations in coloration can be observed among individuals. Unique features include its well-defined septa and the ability to retract its polyps into the skeleton during the day, providing protection from intense light and potential herbivory.
Behavior & temperament
Open Brain Coral exhibits a primarily nocturnal feeding behavior, extending its polyps to capture plankton and organic debris from the water column. It is a solitary coral species that does not form large colonies, instead occupying a defined territory on the reef. While it does not exhibit aggressive territoriality, it can engage in competition with neighboring corals through the use of sweeper tentacles that possess nematocysts capable of delivering a mild sting. This coral species often forms symbiotic relationships with zooxanthellae, which provide essential nutrients through photosynthesis, although it is also capable of heterotrophic feeding. Its movement is minimal, primarily limited to polyp extension and retraction.
Diet & feeding
Trachyphyllia geoffroyi is primarily a heterotrophic feeder, capturing zooplankton and organic particles from the water column. In captivity, it requires a diet supplemented with high-quality coral food and can benefit from occasional feedings of finely chopped seafood or specialized coral pellets.
Behind the name
The genus name 'Trachyphyllia' is derived from the Greek words 'trachys', meaning rough, and 'phyllon', meaning leaf, referring to the rough texture of the coral's polyps. The species name 'geoffroyi' honors the French naturalist Étienne Geoffroy Saint-Hilaire.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Open Brain Coral?
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