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

Billy[1] is a short lime green parrotfish and a main citizen of Bikini Bottom. He is Evelyn's son. He first appears in the episode "Pickles."

There seems to be a continuity error with his age; in "Walking Small," he is shown to be a child, but in other episodes he is shown to be an adult.


Billy is a lime green fish with orange-red lips. He also wears a light orange T-shirt with a red stripe on it. Billy also has a light green dorsal fin and light orange stripes.


  • "Mom, look, someone left a toy tractor over here." —"Walking Small"
  • "Hooray!" (along with female fish in the bus)