At long last, I've acquired issue #2 of Wonder Space Fish, and in mint condition!
— Incidental 18, Rule of Dumb

Incidental 18 is a background character in the series who makes several cameo appearances. He is a resident of Bikini Bottom. He is classified as a "weirdo" type incidental.


He is a short, light olive green fish with red-orange dots and lips. He wears square shaped nerd glasses and black shoes. He is drawn with a tail fin in "Christmas Who?" and "SpongeBob Meets the Strangler."

Role in series

"Ripped Pants"

He is laughing at SpongeBob's ripped pants, however, after SpongeBob plays a drowning on him he become annoyed and leaves.


He is seen at the Krusty Krab.


He is seen at the Krusty Krab.

"Squeaky Boots"

He is seen at the Krusty Krab.

"Culture Shock"

He is seen at the Krusty Krab talent show.

"MuscleBob BuffPants"

Sandy asks him and Scooter, where SpongeBob.


He flees from the Krusty Krab after discovering SpongeBob has a cold.

"Valentine's Day"

He is seen at the carnival.


He is seen at the party for Sandy.

"Walking Small"

He is seen at Goo Lagoon.


He is seen running from Wormy.

"Patty Hype"

He is seen as part of the crowd, when SpongeBob is being lifted to the Krusty Krab.

"Prehibernation Week"

He is seen when the town searches for SpongeBob.

"Christmas Who?"

He is shown to be part of the crowd wanting to ask for a gift from Santa Claus.

"Squirrel Jokes"

He is seen at the nightly event called the Komedy Krab.

"Squid on Strike"

He is seen cheering after Squidward gives a speech.

"Sandy, SpongeBob, and the Worm"

He is seen at the Krusty Krab.

"SquidBob TentaclePants"

He is seen leaving Squidward's clarinet performance in anger and disgust.

"Rule of Dumb"

He had a comic book collection that he spent his whole life on which he was going to show his mother, but Patrick took it and he ran away crying.


He is one of the various Bikini Bottomites who appears in the episode.

"Mimic Madness"

He is seen at the Krusty Krab.


He is seen at watching SpongeBob and Patrick (later Squidward and Sandy) play sports.

"The Getaway"

He is seen driving.


  • He is forty years old according to the episode "Rule of Dumb."


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