What is the name of the owner of the Chum Bucket?

The owner of the Chum Bucket is Plankton. His full name is Sheldon J. Plankton, and he runs the struggling restaurant across the street from the Krusty Krab.

Plankton is a tiny, green, one-eyed copepod and one of SpongeBob SquarePants’ principal antagonists. The Chum Bucket mainly sells chum, a food made from fish parts that most Bikini Bottom residents find unappetizing. Its poor reputation helps explain why the restaurant rarely attracts customers.

Plankton’s business rivalry with Mr. Krabs is central to the series. While Mr. Krabs owns the successful Krusty Krab, Plankton repeatedly tries to steal the secret Krabby Patty formula so he can sell the burgers at his own restaurant. Karen, his intelligent computer wife, frequently helps him plan these schemes.

A common mix-up is naming Karen as the owner because she is closely involved in the restaurant’s operations. However, the series identifies Plankton and Karen as the married owners, while Plankton is the canonical answer to the singular question asking who owns the Chum Bucket.