Moon Gills is a fish who appears in the episode "There's a Sponge in My Soup."


He is light teal with dark blue fins and dark purple lips. He has long brown hair that is tied together with a dark purple band and has a black zig-zag mustache. He wears ragged pants and no shirt.


He is hanging around the heat behind the Krusty Krab until Mr. Krabs tells him and his friends to leave since Mr. Krabs hates the hippies. He goes into the Krusty Krab kitchen and finds the soup vat, which he promptly jumps into so he can stay warm. Along with his friends, he bothers the customers, Mr. Krabs, and SpongeBob. He eats the food SpongeBob puts into the soup and bothers the customers via their soup bowls. Mr. Krabs and SpongeBob try to fish out the hippies using a beaded bag, but Crystal Dave and Moon Gills manage to get it into the soup. Mr. Krabs, Squidward, and SpongeBob then attempt to almost lure them out with a drum circle, but the Krusty Krab employees can't keep the drums going long enough. SpongeBob is sent into the soup to get the hippies out, but he becomes a hippy himself. At the end, Moon Gills is sent to Squidward's bathtub to keep warm.