Ruby Red Emerald Crab

The Ruby Red Crab, Mithraculus ruber, is coveted for its color, scavenging skills, and appetite for bubble algae.

Native to Caribbean reefs, the Ruby Red Crab is nocturnal. By day, it seeks shelter in caves and beneath debris. For domestic aquariums, this member of the Majidae family thrives in a mature environment with ample rock structures and hideaways. Once familiar with its new habitat, it will venture out during daylight to graze on algae.

Adequate feeding is crucial for the Ruby Red Emerald Crab. Many aquarists supplement its diet with high-quality pellet fish food, chopped meats like shrimp, and dried seaweed. Without proper nourishment, it might resort to feeding on corals, invertebrates, or even small fish. Yet, when well-fed, most Ruby Red Crabs are notably amicable with other tank inhabitants and harmonize well in reef settings. It’s essential to note that, like other invertebrates, they are sensitive to copper-based treatments and fluctuating water conditions.