This is the page about those related to Sheldon J. Plankton. For other uses, see Plankton (disambiguation).

This article lists the members of the Plankton family.

Family tree

Karen the Crystal Ball
Many generations
Dead Eye Plankton
Four generations
Grand Dad Plankton
Ella Plankton
Moe Bros
Chip I (possibly)
Chip I (possibly)
Silas Plankton
Gordon Plankton
Mama Plankton
Clem, Rupert, and other cousins of Sheldon
Sheldon J. Plankton
Karen Plankton
Chip Plankton II


Pre-modern era



Main article: Planktonamor

Planktonamor is a medieval ancestor of Plankton, who is an evil wizard and appears in the episode "Dunces and Dragons." He was the owner of the medieval king jellyfish, who he would send out to destroy the town unless King Krabs gave him the power. After kidnapping Princess Pearl, SpongeBob was sent out to fight him to the death, winning by stepping on him.

Karen the Crystal Ball

Karen the Crystal Ball

Karen the Crystal Ball is a medieval ancestor of Karen, who is an all-seeing crystal ball married to Planktonamor. She shows Plankton where his enemies are on her screen.

Dead Eye Plankton

Dead Eye Plankton

Main article: Dead Eye Plankton

Dead Eye Plankton is Plankton's western ancestor, who is an outlaw and appears in "Pest of the West." Everyone in Dead Eye Gulch is afraid of him. He uses a whip to threaten the citizens of the town. He brought down from power when SpongeBuck SquarePants stepped on him.

Modern era

Sheldon J. Plankton


Main article: Sheldon J. Plankton

Sheldon J. Plankton a green planktonic copepod who is Mr. Krabs' business rival. He runs an unsuccessful restaurant called the Chum Bucket alongside Karen, a waterproof supercomputer who is his sidekick and wife.

Karen Plankton


Main article: Karen Plankton

Karen Plankton is Plankton's sidekick and wife who supplies him with evil plans to steal the Krabby Patty secret formula. She is a waterproof supercomputer who lives in the Chum Bucket laboratory.

Clem Plankton


Main article: Clem

Clem is the main cousin of Plankton. He is a hillbilly and his antennae are seemingly attached to his hat. It is mentioned that he cannot read.

Rupert Plankton

Main article: Rupert

Rupert is Plankton's country cousin. Unlike the others, he is orange.

Plankton's cousins

Plankton and his Cousins.

Main article: Plankton's cousins

Plankton's cousins include:

  • Clem Plankton
  • Zeke Plankton
  • Rufus Plankton
  • Jeke Plankton
  • Billy Bob Plankton 
  • Billy Jim Plankton
  • Billy Billy Bo Willy Banana Fana Fo Filly Plankton
  • Toad Plankton
  • Enis Plankton
  • Doug Plankton
  • Leisha Plankton
  • Joe Plankton
  • Rainchild Plankton
  • Marvin

Papa Plankton

Plankton (left) and his Dad (right).

Main article: Papa Plankton

Papa Plankton is Plankton's father who appears in the book Hooray for Dads! Mr. Plankton is also mentioned in "Frozen Face-Off" when Plankton brings up that his dad thought he should have minored in business administration.

Mama Plankton

Main article: Mama Plankton
Mama Plankton is Plankton's mother. She is mentioned in the video games Nicktoons Unite! and Creature from the Krusty Krab. Plankton even kept claiming that she would be proud of him if he took over the world and appreciate him more.

Grand Dad Plankton

Grand Dad Plankton

Main article: Grand Dad Plankton

Grand Dad Plankton is Plankton's grandfather who appears in "One Coarse Meal." Plankton sees him when he dreams of being eaten by Pearl. From the fact that Plankton saw him in a whale's stomach, he was eaten by a whale.

Lily Plankton

Gramma Plankton

Main article: Lily Plankton

Lily Plankton is Plankton's grandmother mentioned in "Krabs vs. Plankton" and makes her first physical appearance in "Gramma's Secret Recipe." She later returns in "Grandmum's the Word."



Main article: Fredrick

Fredrick is Karen's father and Plankton's father-in-law. He tends to like drinking English tea, but not to like the husband his daughter married. He has not appeared in an actual episode, but is a character who won in a contest in Nick Magazine. He appears in the December 2009 issue of Nick Mag.


Single Cell Anniversary 198.png

Main article: E.M.I.L.P

E.M.I.L.P. is Karen's mother and Plankton's mother-in-law. Like Fredrick, E.M.I.L.P. does not like Plankton, saying that she wished Karen married an ATM, a person with money, instead of him. She appears in "Single Cell Anniversary" after Karen short-circuited. She is just like her husband Fredrick.

Chip Plankton II


Main article: Chip Plankton II

Chip Plankton II is the son of Sheldon J. Plankton and Karen Plankton. He made his appearance in "Karen's Baby." During his life, he grew up into different computer systems: a calculator (baby), handheld payment terminal (child), video game console (teenager), computer (young adult), and ATM (adult).

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