Sheldon J. Plankton
|Sheldon J. Plankton|
|'SpongeBob SquarePants' character|
|First appearance||Plankton! (July 31, 1999)|
|Portrayed by||Mr. Lawrence|
|Occupation||Boss of the Chum Bucket|
|Relatives||Wife: Karen Plankton|
Son: Chip Plankton II
Sheldon J. Plankton is one of the ten main characters of SpongeBob SquarePants. He is a planktonic copepod who runs the Chum Bucket restaurant alongside with Karen, a waterproof robot who is Plankton's sidekick and wife.
Plankton debuted in the episode "Plankton!", which aired on July 31, 1999.