Incidental 18

Incidental 18 is a fish who first appears in the episode "Ripped Pants." He is classified as a "weirdo" type incidental.

Description
He is a short, light olive green fish with red-orange dots and lips, orange eyes with black pupils, and thin black feet. He wears square shaped nerd glasses.

Role in series
Incidental 18 has very few notable and speaking roles. There is currently only one episode where he speaks. He usually appears in crowds with other incidentals.

"MuscleBob BuffPants"
Scooter tells him about how huge SpongeBob looks with his new Anchor Arms before Sandy asks them where SpongeBob is.

"Mid-Life Crustacean"
He is seen playing ball with Incidental 151 and Incidental 102 where they accidently send their ball towards Mr. Krabs and ask him for it back. Mr. Krabs asks if he can join them and then they tell him to keep the ball and refuse to play with him due to being too old.

"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 took it and he ran away crying.

"The Good Krabby Name"
He is part of the 2% of the population of Bikini Bottom who have never eaten at the Krusty Krab.

"Cuddle E. Hugs"
He is the second one to be devoured by Cuddle E. Hugs followed by Incidental 4.

Trivia

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