Goniastrea Brain Coral Care Guide
Goniastrea retiformis · Saltwater LPS Coral
What Goniastrea Brain Coral look like
Goniastrea retiformis, commonly known as the Brain Coral, exhibits a robust and intricate structure characterized by its large, dome-shaped colonies that can reach up to 1 meter in diameter. The coral's surface is adorned with prominent, meandering valleys and ridges, which are formed by its polyps that extend during the night for feeding. Each polyp can measure up to 1 cm in diameter and is housed within a calcareous cup, contributing to the overall skeletal structure. The coloration of Goniastrea retiformis can vary widely, displaying hues of green, brown, and yellow, often with contrasting patterns that enhance its visual appeal. This species exhibits minimal sexual dimorphism, as both male and female polyps appear similar. Defensive adaptations include the presence of nematocysts within the tentacles, which can deliver a mild sting to deter potential predators. Unique features include the well-defined septa and the presence of a prominent central mouth, indicative of its feeding strategy.
Behavior & temperament
Goniastrea retiformis is primarily a sessile organism, displaying limited movement through the extension and retraction of its polyps. It engages in a symbiotic relationship with zooxanthellae, utilizing photosynthesis to supplement its nutritional intake. During the day, the coral's polyps remain retracted, while at night, they extend to capture plankton and detritus from the water column. This species is generally non-aggressive towards neighboring corals but can engage in competition for space through the use of sweeper tentacles. Goniastrea retiformis exhibits a relatively slow growth rate and can live for several decades, making it a long-term inhabitant of reef ecosystems.
Diet & feeding
Goniastrea retiformis is primarily a heterotrophic feeder, capturing zooplankton and organic particles from the water column at night. In captivity, it thrives on a diet of finely chopped meaty foods, such as mysis shrimp and zooplankton, along with regular supplementation of phytoplankton.
Behind the name
The genus name 'Goniastrea' is derived from the Greek words 'gonia', meaning angle, and 'strea', meaning layer or sheet, referring to the angular structure of the coral. The species name 'retiformis' is derived from the Latin word 'retis', meaning net-like, indicative of the coral's intricate skeletal structure.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Goniastrea Brain Coral?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.
