Billy Fishkins is a very short fish even being shorter than his date. He is mainly brown in color and has fuzzy hair and wears glasses.
Billy Fishkins was first seen briefly as SpongeBob first enters the prom to join Pearl in the photo shoot. He was seen again along with one of Pearl's friends as her date. Billy's only line in the episode is "Meep".
He also appeared in Don't Look Now as the Snack vendor at the Reef Cinema.