Common name: Decorated Crab

General information

The Decorated Crab, scientifically known as Xenocarcinus tuberculatus, is a unique species of crab that is well-known for its symbiotic relationship with certain corals. This crab is characterized by its ability to camouflage itself by attaching pieces of sponge, algae, and other materials to its shell, making it an interesting addition to any reef aquarium.

Care

Caring for the Decorated Crab requires an established reef tank with plenty of live rock and hiding places. They are generally peaceful and can coexist with other non-aggressive tank mates. It's important to ensure that the tank has a stable environment with consistent water quality, as sudden changes can stress these invertebrates.

Reproduction

Reproduction in Xenocarcinus tuberculatus occurs through the release of eggs into the water column. The larvae go through several planktonic stages before settling down and developing into juvenile crabs. In the aquarium setting, breeding is not commonly observed due to the complexity of rearing the larvae.

Symbiosis

The Decorated Crab has a fascinating form of symbiosis with corals, particularly with species of the genus Pocillopora. It decorates its shell with fragments of the coral, which not only provides camouflage but also offers protection from predators. This relationship is commensal, where the crab benefits without harming the coral.

Habitat

Xenocarcinus tuberculatus is typically found in the Indo-Pacific region, inhabiting coral reefs where it can blend in with its surroundings. They are often associated with branching corals, which provide them with materials for decoration and camouflage.