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Sheldon J. Plankton


Mr. Plankton

Residence: Bikini Bottom, Pacific Ocean
Interests: Krabby Patties
Occupation(s): The Krusty Krab owner
Physical appearance
Gender: Male
Color: Deep Green
Eye color: Yellow and red
Classification: Plankton
Children: Pearl Plankton (daughter)
Parents: The same as main Plankton's parents
Grandparents: The same as main Plankton's grandparents
Ancestors: The same as main Plankton's ancestors
Friends: SpongeBob SquarePants
Squidward Tentacles
Enemies: Krabs
Series information
Appearance: "The Algae's Always Greener"
List of characters

Sheldon J. Plankton, more commonly known as Mr. Plankton, is the owner of the Krusty Krab in "The Algae's Always Greener." He only appears in a photo with his daughter towards the beginning of Plankton's time in Mr. Plankton's universe.


He looks identical to Plankton except, he wears the same style of clothes as Main Universe Mr. Krabs.


His only known family is his daughter, Pearl Plankton.


He runs the Krusty Krab.


This section contains speculative information. This information has not been confirmed. Please keep this in mind.

Most of his life events are likely the same as Plankton up to the point when he and Mr. Krabs lost their friendship.

It is is possible that in this universe, Mr. Krabs and Plankton were in the reverse places inside their restaurant. This means that Mr. Krabs went flying out the door, gaining only "chum" as part of the recipe and Plankton hit the wall making the ingredients on the shelf fall, making the Krabby Patty. His success would lead to him leaving Karen for the female that Main Universe Mr. Krabs marries. Mr. Plankton and this female have Pearl Plankton. Mr. Plankton then hires the exact same people as main universe Mr. Krabs to get him where he is today.


He appears in a photo, in which he wears a swimsuit, with his daughter when Plankton first arrives in Mr. Plankton's universe.

He is later mentioned and referred to by numerous characters because they think that Plankton is him.


  • It is possible that technically, the main universe Plankton also switched lives with the Actual Mr. Plankton meaning that Plankton and Mr. Plankton have also switched souls making the actual Mr. Plankton getting the Main Universe Plankton's Body in the Main Universe for a while since there was a picture of Mr. Plankton and Alternate Universe Pearl as a memory, for example.

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