Common name: Xenocarcinus

Xenocarcinus is a genus of crabs that are known for their symbiotic relationships with sea cucumbers. They are small, often cryptic, and have adapted to live on the bodies of their hosts, camouflaging themselves against predators. In the aquarium, they are a unique addition, but their care requires the presence of a compatible sea cucumber host and a stable, mature system. They are peaceful and can coexist with other non-aggressive tank mates.