Common name: Spider Decorator Crab

General information

The Decorator Crab, scientifically known as Camposcia retusa, is a fascinating species of crab that is well-known for its unique behavior of decorating its shell with various materials from its environment. This behavior serves as an effective camouflage, protecting the crab from predators. They are found in the Indo-Pacific region and are a popular choice for reef aquariums due to their interesting appearance and behavior.

Care

Decorator Crabs require a tank with plenty of live rock and a sandy substrate to mimic their natural habitat. They are generally peaceful and can be kept with a variety of tank mates. However, care should be taken as they may pick at slow-moving fish or sessile invertebrates. They are omnivores and will accept a varied diet including meaty foods and marine algae.

Reproduction

In the wild, Decorator Crabs are known to reproduce by releasing eggs into the water column, which then develop into planktonic larvae. In captivity, breeding is less common, but with optimal conditions, it is possible to observe larval stages in the aquarium.

Symbiosis

While not hosting other organisms like anemones or corals, the Decorator Crab's symbiotic relationship is with the materials it collects for camouflage. This can include sponges, algae, and other small invertebrates, which can continue to grow and live on the crab's shell, providing a dynamic and ever-changing appearance.

Habitat

Camposcia retusa is typically found in coral reef environments and rocky areas where it has access to a variety of materials for decoration. They are adept at blending into their surroundings, making them a challenge to spot in the wild.