Ella[1] Lily[2] Plankton,[3] more commonly known as Grandma Plankton, is Sheldon J. Plankton's paternal grandmother and the grandmother-in-law of Karen Plankton. She first appears in the episode "Gramma's Secret Recipe," and later appears in the episodes "Grandmum's the Word," "Karen's Virus" and "The Ghost of Plankton."


"Gramma's Secret Recipe"

She looks similar to Plankton, except that she has glasses, dentures, lavender 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.

"A Plankton Family Tree"

She’s 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 and had two sons named Gordon 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 grammyma.

She later appears at the end of the episode, where she angrily drags Plankton away from the formula and out of the Krusty Krab due to him stealing her belongings as part of a scheme.

"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 would 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 is sleeping, the Krusty Krew takes the formula back from her.

"Karen's Virus"

A picture of her appears in Plankton's kitchen.

"The Ghost of Plankton"

She appears at her grandson's funeral and is shocked when Plankton becomes alive. Lily and the other attendees believe that Plankton faked his death as a cruel joke and start attacking him in anger.


Plankton's grandmother hair error

Hair error

  • In "Gramma's Secret Recipe," there is an error where Plankton stole her hair as part of a scheme, but she is still shown with hair after Plankton stole it. This error was later fixed in American re-runs and on the Complete Seventh Season and The Next 100 Episodes DVD releases.
  • In "Grandmum's the Word," she develops a crush on Squidward and she’s even shown married to him when she dreams of world domination after stealing the secret formula.
  • In A Plankton Family Tree, she’s called "Ella" instead of "Lily."
  • She was completely unaware that Karen was her granddaughter-in-law.


Plankton (VE)

Sheldon J. PlanktonClemRufusRainchildSheldon J. Plankton (Mr. Plankton's Universe)Gordon PlanktonLily PlanktonBasiaAlvinSilas PlanktonPlanktonamorDead Eye PlanktonGrand Dad PlanktonGreen PlanKrabIdeal PlanktonCousin MarvinDream Lily PlanktonMama PlanktonMoe BrosPlanKrabPlankton zombiesPlanktonamorRed PlanKrabSeymourSheldon J. Plankton (Bikini Bottom 2)

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