Common name: Ctenella Coral

General information

The Ctenella chagius, commonly known as the Ctenella Coral or Chagos Brain Coral, is a unique and visually striking species of stony coral. It is the only species in the genus Ctenella and is characterized by its brain-like appearance with deep, interconnected valleys and ridges. The coral exhibits a range of colors, typically from green to brown, with the valleys often being lighter than the ridges.

This species is not as common in the aquarium trade as some other brain corals, partly due to its limited distribution and slower growth rate. However, its distinct appearance makes it a prized specimen for dedicated hobbyists looking to add diversity to their reef tanks.

Care

Ctenella Coral requires moderate to high lighting conditions to thrive, as it relies on its symbiotic zooxanthellae for nutrition through photosynthesis. It also benefits from moderate water flow, which helps in the removal of waste products and delivery of nutrients.

Hobbyists should maintain stable water parameters, particularly calcium and alkalinity levels, to support the coral's skeletal growth. Feeding is not typically necessary, but the coral can benefit from occasional target feeding with microplankton or other coral foods designed to stimulate growth and coloration.

Symbiosis

Like many stony corals, Ctenella chagius hosts symbiotic zooxanthellae within its tissues. These microscopic algae provide the coral with the majority of its nutritional needs through photosynthesis. In return, the coral provides a protected environment and the compounds necessary for the zooxanthellae to carry out photosynthesis.

Habitat

Ctenella chagius is endemic to the Chagos Archipelago in the Indian Ocean. It typically inhabits reef slopes and lagoons, often found at depths ranging from 5 to 20 meters. The species prefers areas with strong water movement and ample lighting, which are essential for the health of its symbiotic algae.