Sally Light Foot Crab
| Scientific Name | Percnon gibbesi |
| Diet | Omnivore; Micro Algae, Scavenger |
| Alt Common Name | Nimble Spray and Urchin Crab |
| Family | Grapsidae |
| Origin | Circumtropical |
| Aquarist Level | Novice |
| Reef Safe | With Caution † |
| Coloration | Tan with Green & Yellow highlights |
| Disposition | Moderate |
| Hardiness | Very |
| Mature Size | 2 inches |
| Reproduction Method | Females carry eggs on abdomen. |
| Sexual Dimorphism | Females have wider abdomens. |
| Venomous | No |
Notes: This species must molt in order to grow. Generally at night, it will lay on its back and exit its exoskeleton. A new exoskeleton is excreted and will harden over a period of several hours. The animal is vulnerable at this time and should not be disturbed. Proper iodine levels assist with successful molting.
Will associate will Diodema urchins. The crab does not require the presence of the urchin but will commonly hide under it if available.
† May eat fish smaller than itself when other food is not available. This is a rare occurance.