Shelley is a scallop owned by SpongeBob, and is hung in a birdcage in the latter's bedroom. She first appears in the pilot episode "Help Wanted."
Shelley is a small and light pink scallop. She is normally kept in a cage hanging from SpongeBob's bedroom ceiling.
Shelley has appeared in many episodes, but has never been addressed directly. In the PC version of The SpongeBob SquarePants Movie video game, during "Chapter 1: Love thy Neighbor," she gets out of her cage.
- Her name is revealed in "The Bikini Bottom's Up Tour," a special feature on Disc 3 of The Complete 1st Season. When the viewer selects her cage, Patchy will say that her name is "Shelley."
- She is the only female character to appear in "Help Wanted" if all of the anchovies in that episode are male.
- SpongeBob wants a pet to keep Gary company in "A Pal for Gary" despite the fact that he has Shelley.