Lily[1] Plankton[2] is Sheldon J. Plankton's paternal grandmother, the grandmother-in-law of Karen Plankton, the mother-in-law of Mama Plankton, and the mother of Gordon Plankton. She first appears in the episode "Gramma's Secret Recipe." She may have been mentioned in the episode "Krabs vs. Plankton." She is called "Gram-Gram" in that episode. She appears again in the episodes "Grandmum's the Word" and "Karen's Virus."


"Gramma's Secret Recipe"

She looks similar to Plankton, except that she has glasses, dentures, lavender-colored puffy hair and wears an orange dress that has light green polka dots with pink lipstick. Unlike most other plankton in the series, she appears to have two eyes instead of just one, but in "Grandmum's the Word," she has one eye and however it was revealed that she is evil just like her grandson Plankton and wants to steal the secret formula for herself and rule the Krusty Krab.

"A Plankton Family Tree"

She is a dark green with five legs, two small white eyes, glasses, and blonde hair with a pink ribbon in it.


Lily was born to Seymour and Basia. Lily was one of four children. Her brothers are the Moe Bros and Alvin.

At some point, she married an unnamed plankton.

At some point, the two had two sons, Gordon Plankton and Silas Plankton.

At some point, she started to make and can chum.

When her husband was old, he was eaten by a whale.

Role in series

"Gramma's Secret Recipe"

Lily lives in Shady Shoals Rest Home along with many other elderly citizens, including Mermaid Man and Barnacle Boy. Plankton dresses up as her in another attempt to steal the Krabby Patty secret formula. Plankton borrows his grandmother's glasses, dentures, dress and puffy hair to pretend to be SpongeBob's great grandmother.

"A Plankton Family Tree"

Lily, referred to as "Ella," appears on her family tree.

"Grandmum's the Word"

She comes to the Krusty Krab as it is her 90th birthday and Plankton promised that he'd own the Krusty Krab by then. Since he does not, Plankton fools his grandma by getting the Krusty Krew to cover for him. Throughout the episode, Lily checks out the Krusty Krab. When Lily asks for a photo with her with the formula, she takes off with a jetpack, fooling everyone. When she gets back to Shady Shoals, she gets a dream with her ruling the Krusty Krab. While she's sleeping, the Krusty Krew take the formula back from her.


Plankton's grandmother hair error

Hair error

  • Plankton once took her hair even though she had her hair in bed. This error was later fixed in American re-runs and on the season 7 DVD release.
  • In "Gramma's Secret Recipe," she has two eyes, but in "Grandmum's the Word," she has one eye like Plankton.
  • In "Grandmum's the Word," she develops a crush on Squidward and wants to steal the Krabby Patty Secret Formula and wants to take over the Krusty Krab too.
  • In A Plankton Family Tree, she is called "Ella" instead of "Lily." It is unknown if this is another name of hers or if this comic is non-canon.
    • It is also possible that "Lily" is a nickname as she says, "Call me Lily," in "Grandmum's the Word."
  • A picture of her appears in Plankton's kitchen in "Karen's Virus."
  • She was completely unaware that Karen was her granddaughter-in-law.
  • She is 90 years old, while her grandson is already in his mid 70s, which indicates that she and one of Plankton's parents had kids at a very young age.


Plankton (VE)

Sheldon J. PlanktonClemBilly Jim PlanktonJoe PlanktonBilly Bob PlanktonRufusBilly Billy Bo Billy Banana Fana Fo FillyDougEnis PlanktonFletcher McGeeRainchildJekeFlemJulioTimmyZekeDream PlanktonSheldon J. Plankton (Mr. Plankton's Universe)Gordon PlanktonLily PlanktonPlank-TonBasiaAlvinSilas PlanktonPlanktonamorDead Eye Plankton

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