Common name: Lesser star coral

General information

Goniastrea aspera, commonly known as Rough Star Coral, is a species of stony coral that is appreciated by reefkeepers for its hardiness and unique appearance. This coral is characterized by its bumpy surface texture and the star-like pattern of its corallites, which are the skeletal cup structures that house the coral's polyps.

Care

Rough Star Coral is considered a good choice for intermediate to advanced aquarists due to its moderate care requirements. It thrives in stable water conditions with moderate to high lighting and moderate water flow. It is important to maintain consistent levels of calcium, alkalinity, and magnesium to support its skeletal growth.

Feeding is not strictly necessary as Goniastrea aspera benefits from the photosynthetic activity of its symbiotic zooxanthellae. However, occasional feeding with microplankton or finely minced seafood can promote faster growth and more vibrant coloration.

Symbiosis

Like many stony corals, Goniastrea aspera harbors symbiotic algae known as zooxanthellae within its tissues. These algae perform photosynthesis, providing the coral with essential nutrients while benefiting from the coral's waste products in a mutualistic relationship.

Habitat

The natural habitat of Goniastrea aspera is the reef slopes and lagoons of the Indo-Pacific region. It is often found at depths ranging from shallow waters to about 20 meters, where it forms part of the diverse coral reef ecosystem.