Common name: Red-Spotted Coral crab

General information

The Red-spotted Guard Crab, scientifically known as Trapezia rufopunctata, is a small but fascinating member of the reef community. These crabs are known for their striking coloration, with a base color of brown to reddish-brown and distinctive red spots on their carapace and claws. They are relatively small, reaching only about 2-3 centimeters in size.

Care

Trapezia rufopunctata is a hardy species that can be a great addition to a reef aquarium. They require a tank with plenty of live rock and hiding places to feel secure. These crabs are not aggressive towards fish or other invertebrates, but they may defend their territory against other crabs. They are omnivorous and will scavenge for food, but they should also be provided with a varied diet including meaty foods and marine-based flakes or pellets.

Reproduction

In the wild, Trapezia rufopunctata breeds throughout the year. In captivity, successful breeding can occur if the environment is stable and there are multiple individuals to encourage pairing. The female carries the fertilized eggs beneath her abdomen until they hatch into planktonic larvae.

Symbiosis

One of the most interesting aspects of Trapezia rufopunctata is its symbiotic relationship with Pocillopora corals, particularly with species like @species:pocillopora-damicornis. These crabs live within the branches of the corals, where they find protection from predators. In return, they help defend the coral from crown-of-thorns starfish and other coral-eating predators. Additionally, they promote coral health by cleaning away debris and algae that can smother the coral.

Habitat

Trapezia rufopunctata is found in the Indo-Pacific region, from the Red Sea and East Africa to the central Pacific. They inhabit coral reefs, particularly those dominated by Pocillopora corals, at various depths.