|Spouse:||Mama Plankton (wife)|
|Children:||Sheldon J. Plankton (son)|
|Parents:||Grandpa Plankton (father)|
Grandma Plankton (mother)
|Nieces:||Plankton's Female Cousins|
|Nephews:||Plankton's Male Cousins|
Dead Eye Plankton
|Other relatives:||Karen (Daughter-in-law)|
|First appearance:||Hooray for Dads!|
|Latest appearance:||"Frozen Face-Off" (mentioned)|
|List of characters|
Papa Plankton is the father of Sheldon J. Plankton.
He looks like his son, except he is yellow green, has a blue eye, instead of a red one, wears an orange shirt with red flowers on it and has a brown mustache.
He married Mama Plankton.
He had one son named Sheldon J. Plankton.