Incidental F18 is a fish who makes several cameo appearances throughout the series, starting with the episode "Culture Shock."
She is a pale orange fish with a light green back fin. She also wears a lavender dress.
Role in series
She appears in the crowd during the Krusty Krab talent show.
She and Lisa are shown playing the flute in Squidward's symphony night.
She is seen to be the owner of two worms, entering them in the Bikini Bottom Pet Show.
She is seen in the background as a customer of the restaurant Fancy!