Common name: Chagos Brain Coral

General Information

The Chagos Brain Coral, scientifically known as Ctenella chagius, is a unique and captivating species of stony coral endemic to the Chagos Archipelago. This coral is distinguished by its intricate, maze-like skeletal structure, resembling a brain, which is a characteristic feature of many brain corals. Its robust structure and fascinating patterns make it a sought-after species for dedicated coral enthusiasts, particularly those interested in rare and region-specific specimens.

Despite its allure, Ctenella chagius is not commonly found in the aquarium trade due to its limited distribution and specific habitat requirements. Its presence in the hobby is often more for educational and conservation-focused displays rather than for general decorative purposes. This coral plays a crucial role in its natural habitat, contributing to reef building and providing shelter for various marine organisms.

Care

Ctenella chagius requires a stable and well-maintained aquarium environment to thrive. It is best suited for experienced aquarists who can provide the precise conditions it needs. This includes maintaining stable water parameters and ensuring adequate calcium and alkalinity levels to support its calcification process. As a photosynthetic coral, it relies on zooxanthellae for energy, though it can benefit from occasional target feeding of microplankton or coral-specific foods.

Given its natural habitat in the Chagos Archipelago, replicating a similar environment with moderate water flow and appropriate lighting is essential. This coral prefers to be placed in the middle to bottom sections of the tank where it can receive adequate light without being exposed to excessive direct light that might cause bleaching.

Diet and Feeding

The Chagos Brain Coral is primarily photosynthetic, deriving most of its nutritional needs from the symbiotic relationship with zooxanthellae. However, supplemental feeding can enhance its growth and coloration. Feeding should be done sparingly, with offerings of microplankton or liquid coral foods designed for stony corals.

Behavior and Compatibility

Ctenella chagius is a peaceful coral that can coexist with a variety of other coral species. However, like many brain corals, it has long sweeper tentacles that can sting neighboring corals if placed too closely. Therefore, it is advisable to provide ample space between it and other corals to prevent aggressive interactions.

Health and Common Issues

In captivity, Ctenella chagius can thrive if provided with stable conditions. However, it is susceptible to stress from rapid changes in water parameters, which can lead to bleaching. Regular monitoring of water quality and parameters is essential to prevent such issues. Additionally, maintaining proper calcium and alkalinity levels is critical for its skeletal growth and health.

Habitat

Ctenella chagius is endemic to the Chagos Archipelago, where it inhabits shallow reef environments. These reefs are typically characterized by clear, warm waters with moderate water flow, providing the ideal conditions for this coral's growth and development. Its natural habitat underscores the importance of replicating similar conditions in captivity to ensure its well-being.