Common name: Seven-eleven Crab

General information

The Spotted Reef Crab, Carpilius maculatus, is a colorful and active crustacean that adds both diversity and a touch of drama to the reef aquarium. Known for its striking spotted pattern, this crab is not only a visual delight but also serves as a scavenger, helping to keep the tank clean by consuming detritus and uneaten food.

While generally peaceful, it's important to note that Carpilius maculatus can exhibit opportunistic predatory behavior, particularly towards small, slow-moving fish or molting tank mates. Therefore, careful consideration should be given to tank companions.

Care

Spotted Reef Crabs require a well-established aquarium with plenty of live rock and hiding places to feel secure. They are relatively hardy and can adapt to a variety of tank conditions, but they do best in a stable environment with consistent water quality.

Feeding is straightforward as they are not picky eaters. A varied diet that includes meaty foods, such as chopped fish, shrimp, and squid, as well as some vegetable matter, will keep them healthy and satisfied.

Reproduction

In the wild, Carpilius maculatus engages in a complex mating ritual that involves the male cradling the female prior to molting, which is when she is receptive to mating. In captivity, breeding is less common, but with optimal conditions, it is possible to witness this fascinating behavior.

Symbiosis

While not known for any specific symbiotic relationships in the same vein as clownfish and anemones, the Spotted Reef Crab does play a role in the ecosystem by cleaning up waste, which indirectly benefits other tank inhabitants by contributing to a healthier environment.

Habitat

Carpilius maculatus is found in a range of marine environments from shallow reefs to deeper waters. They are typically associated with coral and rocky substrates where they can find ample food and shelter.