This is the page about the baby. For other uses, see Billy (disambiguation).

Baby Billy Peterson[1] is Shubie and Nat Peterson's baby son. He is also the younger brother of Susie Peterson. He first appears in the episode "Goo Goo Gas."


Billy is a light yellow fish, with blue eyes and one tooth. He wears spiky purple headgear and a white diaper. He also likes to suck on a pale-red pacifier.

Role in series

"The Sponge Who Could Fly"

Billy briefly appears as one of the baby triplets of two fish who tell SpongeBob that he is not the only one whose dreams have been ruined.

"Goo Goo Gas"

Billy is seen with his mother, Shubie, at Barg'N-Mart, sitting in a shopping cart while his mother shops. He is later insulted by Plankton, which causes Shubie to run over Plankton with her shopping cart twice.

"Free Samples"

His name is revealed to be "Billy" when Shubie tells him to look at Squidward while he is dancing in a monkey costume. He appears again later in the episode when Shubie holds him during the riot.

"The Getaway"

He appears with Debbie Rechid, who is hanging clothes, when SpongeBob and Stickyfins Whiting crash through.

"Sanitation Insanity"

Nat Peterson is revealed to be his father.


  1. ^ "Free Samples." SpongeBob SquarePants. Nickelodeon. DATE. Television.
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