Common name: Sinuous cup coral

General information

Symphyllia recta, commonly known as Symphyllia Coral or Open Brain Coral, is a species of large polyp stony (LPS) coral that is popular among reef aquarium enthusiasts for its vibrant colors and intriguing growth patterns. This coral exhibits a meandering, flabello-meandroid skeleton, which means its polyps are connected by a series of winding valleys. The colors of Symphyllia corals can range from bright reds, greens, blues, to more subtle pastel shades, often with contrasting valleys that add to their visual appeal.

Care

Symphyllia corals are moderately easy to care for, making them suitable for intermediate-level aquarists. They thrive in moderate lighting conditions and benefit from moderate water flow, which helps to keep their surfaces free of detritus and delivers nutrients to their polyps. It's important to provide them with a stable environment, as they can be sensitive to rapid changes in water parameters. Feeding is recommended, with a diet that includes meaty foods like mysis shrimp and finely chopped seafood to promote growth and coloration.

Symbiosis

While Symphyllia corals do not have a specific symbiotic relationship like clownfish and anemones, they do host a variety of marine life. Small reef fish may seek shelter among their polyps, and certain species of crabs and shrimp may establish a cleaning station or refuge within the coral's structure.

Habitat

Symphyllia recta is found in the Indo-Pacific region, typically on reef slopes and in lagoons. They prefer locations where they can receive ample indirect sunlight and are often found at depths where light penetration is optimal for their zooxanthellae, the symbiotic algae that live within their tissues and provide them with energy through photosynthesis.