— Incidental 73, "The Clam Whisperer"
He is a spiky light green and light blue fish with blue lips and spots. He wears a purple shirt. In his older appearances, he had visible nostrils and wrinkles under his mouth. His head was also angular.
He is a lot shorter and has an indigo dorsal fin, big bulging eyes, and three spots on his sides. He also wears dark indigo pants that cover up his feet. In his older appearances, he wore no pants like his normal variant and his dorsal fin was colored light green.
He wears a black and violet suit over a white dress shirt with a red bow tie.
He wears a white dress shirt with a violet necktie, indigo pants, and black shoes.
- In "No Free Rides," his name is Harris.
Role in series
Incidental 73 is a somewhat commonly used incidental character, he makes more minor appearances than notable ones. He also has a "KID" variant that mostly appears as a child in many episodes. He was firstly designed to be a Krusty Krab customer.
He spots SpongeBob through the Krusty Krab window when Incidental 70 states that he is back.
"No Free Rides"
He is part of the angry mob demanding Krabby Patties from SpongeBob.
He is part of Squilliam Fancyson's group of friends.
He appears as a student in SpongeBob and Patrick’s class in Mrs. Puff's Boating School where he laughs with the other students when Patrick says his name is 24.
He is part of the jury.
SpongeBob comes out of his shirt after Mr. Krabs flushes him down the toilet.
Incidental 73KID appears as one of Krabs' and Plankton's past bullies. Later, he and Incidental K2 both say "We can actually hold it down." after trying Krabby Patties.
Incidental 73KID appears as a Camp Sun-N-Fun or Bust camper.
He is a tuba player along with Richard A. Bottomfeeder in Squidward's orchestra.
Incidental 73KID appears as one of the Boy Scouts sleeping under Giant Squidward's toenails.
He appears as one of the fancy fish walking with SpongeBob.
He appears as one of the tourists.
He and Fred watch SpongeBob and Patrick fight in the Krusty Krab.
He appear as a violin player in the show SpongeBob and Squidward watch.
He is seen standing in a line at the fair where Squidward and Larry run into him and the other fish in the line from behind him with their jet ski.
When the fancy fish asks SpongeBob what his name is, SpongeBob nearly says his real name until Incidental 73 appears beside him and reminds SpongeBob his name is now "SpongeRobert."
Incidental 73KID was one of the three kids at the Krusty Krab with Incidental 6 acting wild while he tries to get the kids to calm down and eat their patties. SpongeBob then mimics Incidental 6 which causes Incidental 6 and the three kids to laugh. Incidental 6 then angrily tells the kids to eat their patties and they do so in fear.
Incidental 73KID appears as one of the children riding Patrick. He then launches him and the other kids off his back. Mr. Krabs catches all of the kids except for 73KID, causing him to yell "My wittle weg." Patrick then runs over him, which causes him to yell "My other wittle weg."
He is seen as a kid struggling to build a tent with Incidental 100 and Incidental 103 until a pen falls from the Great Pacific garbage patch and they used the pen to hold the tent up. The kids then thank King Neptune for the pen.
He is seen at the Krusty Krab with the unnamed orange adult where SpongeBob uses the string to pull their clothes apart.
He appears as Incidental CM14 at Blow Your Top Lounge where he destroys his middle tooth so he can have a gap in his teeth like SpongeBob.
When Mr. Krabs notices the Boating School lighthouse heading towards the Krusty Krab. He tells his customers to form a wall to protect the restaurant but Incidental 73 says that he expected Mr. Krabs to tell all the customers to run for their lives.
Incidental 73KID is seen exchanging Christmas gifts with Incidental 48 at the Krusty Krab.
SpongeBob drives after Incidental 73KID who is riding a bicycle when he sees him ride right past a stop sign. He eventually crashes into the dynamite museum along with the bikers that were going after SpongeBob.
He is seen standing in an open space with other Bikini Bottom citizens where SpongeBob and Squidward attempt to pull their food truck up to them until another food truck steals their spot.
Major roles in The Patrick Star Show
He is seen during Ancient Rome times holding a banner that says "Weus Lovous Moronicus!" with Incidental 6, Scooter, Incidental 47, and Incidental 106. He later appears at the yard sale balancing on top of a chess piece until GrandPat Star swipes it away from him.
He is one of the citizens that Patrick grabs when an army of tanks approach him.
Major roles in shorts
He appears as one of the kids that become amazed by seeing Incidental 67 hanging out with SpongeBob as "Juice Man."
Major roles in games
Incidental FG1 appears as a suspect in the game.