Common name: Sally Lightfoot Crab

Percnon is a genus of crabs commonly known as Sally Lightfoot Crabs or Nimble Spray Crabs, renowned for their agility and vibrant colors. These crabs are popular in reef aquariums for their scavenging abilities, helping to keep tanks clean by consuming detritus, uneaten food, and algae. They are generally peaceful but may prey on small, slow-moving tank mates. Percnon crabs require rockwork for hiding and climbing, and they can be sensitive to changes in water quality.

1. 
   Common name: nimble spray crab

   Scientific name: Percnon gibbesi
2. 
   Common name: flat rock crab

   Scientific name: Percnon planissimum