Look I'll just cut to the chase. Do you have a dirty shell and hate bath time?
— Sheldon R. Shellcleaner, "Shellback Shenanigans'
Sheldon R. Shellcleaner
147b - Shellback Shenanigans (248)
Residence: Bikini Bottom, Pacific Ocean
Occupation(s): Owner and operator of Super Shell Cleaner Vacations Unlimited
Aliases: Sheldon J. Plankton
Physical appearance
Gender: Male
Color: Deep green
Eye color: Light yellow and red
Classification: Plankton
Series information
Appearance: "Shellback Shenanigans"
Portrayer: Mr. Lawrence
List of characters

Sheldon R. Shellcleaner is an alter-ego of Plankton who appears in the episode "Shellback Shenanigans." He advertised Gary.


He has the same form as Plankton, but has a black afro and sideburns, a gray mustache, a brown suit and trousers, a light yellow undershirt, a red bowtie, a pair of black shoes, and a gray briefcase.


He arrives at SpongeBob's house offering Gary a one night stay at Club Shell. He then offers to give Gary a temporary shell to replace his dirty one, which he accepts. Gary leaves, and Plankton takes off his disguise, and disguises himself as Gary, to steal the Krusty Krab formula.


  • His last name comes from his made-up occupation, as the owner and operator of the fictional company, Super Shell Cleaner Vacations Unlimited.

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