The Creeper is a large, male, cyan fish with light green fins. He wears a dark tan shirt and burnt orange pants with a belt. He also wears round thin glasses.
The Creeper is first seen appearing to stalk Squidward in a dark alley. He starts to approach Squidward but he ends up running away leaving his groceries behind.
He isn't seen again until near the end of the episode where he meets up with Squidward again in the same alley. As he approaches Squidward, he is then assaulted by numerous objects with the last one being a dumpster.
The Creeper then explains to Squidward that he was only trying to return Squidward's groceries to him. Squidward is surprised as SpongeBob and Sandy run up to find him taking revenge on the Creeper. They walk off as the Creeper is rubbing his head from the pain and Squidward gets arrested for assault and battery.