Common name: Starry cup coral

General information

Acanthastrea faviaformis, commonly known as Closed Brain Coral or Pineapple Coral, is a species of large polyp stony (LPS) coral. It is appreciated for its hardiness and the rich, diverse coloration it can exhibit, ranging from deep greens and reds to more subtle browns and tans. This coral species is often mistaken for Favia corals due to their similar appearance, but can be distinguished by their distinctive corallite structure and septa patterns.

Care

Closed Brain Coral is considered a good choice for both novice and experienced reefkeepers due to its resilience. It thrives in moderate lighting conditions and benefits from moderate water flow, which helps to keep its surface free of debris and promotes better nutrient uptake. Feeding is not strictly necessary, as Acanthastrea faviaformis can obtain nutrients through photosynthesis performed by its symbiotic zooxanthellae, but occasional feeding of meaty foods can promote faster growth and more vibrant coloration.

Symbiosis

Like many corals, Acanthastrea faviaformis hosts symbiotic algae known as zooxanthellae within its tissues. These algae provide the coral with essential nutrients through photosynthesis, while the coral provides the algae with a protected environment and access to light. This mutualistic relationship is crucial for the coral's survival, especially in nutrient-poor waters.

Habitat

Acanthastrea faviaformis is found in the Indo-Pacific region, typically in reef slopes and lagoons. It prefers locations where it can receive moderate light and water flow, which are essential for its growth and health. In the wild, it can be found at various depths, often forming part of the complex structure of coral reefs that support a diverse range of marine life.