The Sally Lightfoot Crab, also known as Percnon Gibbesi, Nimble Spray, Short, or Urchin Crab, is a popular choice for those looking to keep crabs in a home aquarium. Their striking appearance makes them stand out even among the unique selection of animals in their native habitats. It has a brown body, with orange to yellow rings on the legs. It actually belongs to a family of shore crabs, however, it is less likely than the other genera to go on land. Its carapace is very flat. which allows it to hide in small crevices within rock work.