Common name: Corallimorph Decorator Crab

General Information

The Corallimorph Decorator Crab, scientifically known as Cyclocoeloma tuberculatum, is a fascinating species that has captured the interest of marine enthusiasts and aquarists alike. This crab is renowned for its unique behavior of adorning itself with corallimorphs and other sessile invertebrates, which not only provides camouflage but also adds a decorative touch to its appearance. This behavior makes it a captivating addition to any marine aquarium, offering both aesthetic appeal and an intriguing glimpse into the adaptive strategies of marine life.

In the wild, these crabs play a role in the ecosystem by helping to control the growth of corallimorphs and other encrusting organisms. Their presence in the aquarium trade is relatively limited, but they are appreciated for their unique habits and the vibrant colors they can bring to a tank.

Care

Caring for the Corallimorph Decorator Crab requires attention to its need for a varied and enriched environment. These crabs thrive in tanks that offer plenty of live rock and corallimorphs, which they use for decoration and camouflage. A well-established aquarium with stable water parameters is essential for their health and well-being.

While they are generally hardy, it's important to ensure that their environment mimics their natural habitat as closely as possible. This includes providing a variety of surfaces for them to explore and decorate themselves with, as well as maintaining good water quality.

Diet and Feeding

The Corallimorph Decorator Crab is an omnivore, feeding on a mix of detritus, algae, and small invertebrates. In captivity, they should be offered a varied diet that includes marine algae, small pieces of fish or shrimp, and commercial crustacean foods. Feeding should be done several times a week, ensuring that the crab receives enough nutrition to maintain its energy levels and support its unique decorating behavior.

Behavior and Compatibility

These crabs are generally peaceful and can coexist with a variety of tank mates. However, their decorating behavior means they may pick at corals or other sessile invertebrates, so caution is advised when housing them in a reef tank. They are best kept in tanks with plenty of live rock and non-aggressive species that won't disturb their decorating activities.

Symbiosis

The Corallimorph Decorator Crab is known for its symbiotic relationship with corallimorphs and other sessile invertebrates. By attaching these organisms to their shells, the crabs gain camouflage and protection from predators, while the invertebrates benefit from being transported to new locations, potentially increasing their access to food and light.

Health and Common Issues

In captivity, these crabs can live several years if provided with proper care. It's important to monitor their health regularly, watching for signs of stress or disease. Ensuring a stable environment and a balanced diet can help prevent common health issues. Regular water changes and maintaining good water quality are crucial for their well-being.

Habitat

The Corallimorph Decorator Crab is typically found in coral reefs and rocky substrates in the Indo-Pacific region. They prefer environments with plenty of hiding spots and surfaces to decorate, thriving in areas with abundant sessile invertebrates.