I am Sheldon J Plankton, most commonly known as Plankton, I'm one of the ten main characters of the SpongeBob SquarePants franchise. I am a planktonic copepod who runs the Chum Bucket restaurant alongside Karen, a waterproof computer who is my sidekick and wife. The Chum Bucket is highly unpopular in Bikini Bottom because it serves chum, a type of bait made from fish meat.