Sally Lightfoot Crab Facts and Information Eliminating Aiptasia Anemones From Saltwater Aquariums Facts and Care Information About Marine Shrimps Reef Tank Janitors Cycling a New Saltwater Aquarium Without Using Fish Saltwater True Crab Photos All About Saltwater Wrasses for Aquarium Hobbyists Awesome Beginner Fish for a Saltwater Aquarium 10 Best Angelfish That Are Reef Tank Safe … Sally lightfoot crab (Percnon planissimum) 02 of 06. Sally Lightfoot Crab (Percnon gibbesi) From The Aquarium Wiki. Its carapace is bright red with yellow or orange rings around its appendages. My angel lived at the bottom near the crab. It has a brown body, with orange to yellow rings on the legs. It is very useful in keeping reef aquariums clean and free of undesirable algae. Happily for reef aquarist's there are a number of saltwater crabs that are the perfect reef tank janitors to keep problems like hair algae, bubble algae, cyano bacteria, and excess food (detritus) all under control. As an omnivore, the Sally Lightfoot is the ultimate scavenger, consuming detritus, uneaten food, algae and everything else in its path, with the noted exception of living corals. The crab is very aggressive and I’ve been watching him since I put him in because of his behavior. The Sally Lightfoot Crab, Percnon gibbesi, resembles a spider and has two pairs of antennae and five pairs of legs.Their flat and low-to-the-ground body allows them to squeeze into tight spaces and escape potential predators. ... Saltwater Fish.com; The Sally Lightfoot Crab is also known as the Nimble Spray, Short, or Urchin Crab. Its carapace is very flat. But it's important to know what saltwater aquarium crabs are fine for reef tanks and which ones would be reef destroyers. Boy was I hot. My experience was that they are better descried as predatory omnivores. It actually belongs to a family of shore crabs, however, it is less likely than the other genera to go on land. It actually belongs to a family of shore crabs, however, it is less likely than the other genera to go on land. When this crab gets larger and more aggressive, it will also attack and eat small fish and invertebrates. The Flame Scallop is a reef tank safe bivalve which does not threaten any other occupant in a saltwater aquarium. I just had a scooter dissapear on me and then I look in and see the "dead" crab. It has a brown body, with orange to yellow rings on the legs. Behavior: Large specimens can be harmful to small fish and invertebrates although this is less likely if there is sufficient algae for the crab to eat. Sally Lightfoot Crab- semi aggressive, eats food that falls to the bottom, likes to hide, diet can be supplemented with seaweed, meaty foods can also work A filter feeder, it requires target feeding of floating micro-plankton to be kept alive in the aquarium.