All Cyber Clusters have the word "Cluster" at the end of their names, this is also true with the only evolved Cyber Cluster, Fort Megacluster.
Cyber Clusters are robot-like shellfish living in the water. These crustaceans resemble crabs, shrimp, starfish, and hermit crabs.
Controlled by Liquid People, they are used as mobile forts, protected by their shells. When attacked, they respond by emitting bright sparks and supersonic or electromagnetic waves that disrupt their opponents' attack.
see also: Cyber