Sheldon J. Plankton is the one-eyed villain zooplankter. He is a very small character, only a little bigger than a jellybean. Plankton is known as the business rival of SpongeBob. He runs a restaurant called the Chum Bucket, which he is right across Krusty Crab. Plankton is a science whiz with great technological savvy. He aims to steal the recipe of his rival restaurant to get more customers and lure them away from Krusty Krab. Plankton resides in Chum Bucket with Karen, his computer "wife." His ambitions are not limited to fast-food supremacy, but he also intends to rule the world.