He is a light olive fish with slightly light brown fins and lips. He wears blue jeans and a black belt with a silver belt buckle.
In his older appearances, he has his eyes on top of his and head, with bags under them.
He is seen as a student in Mrs. Puff's class. Later, he watches SpongeBob and Patrick fight but leaves after he notices SpongeBob and Patrick are punching, but missing at the same time to which he replies "This is embarrassing."
Squidward happily chats with him about SpongeBob not being there but Frankie gets annoyed with Squidward and asks for his change. When Squidward thought he gave Incidental 107 change he actually gave him SpongeBob's socks and underwear.
He appears as the father of Incidental 152. He is first seen thanking Mr. Krabs for allowing his son to go on the Mauna Loa even though a sign says that he is too short. He and his wife, Incidental 46, are later seen at the end of the episode scolding Mr. Krabs for putting their son in physical danger when the ride falls apart.
He is seen trying to order when there is nobody at the boat due to Squidward's "injury." He is later seen when Mr. Krabs is giving Squidward a back massage and asks for a Krabby Patty during the process. An annoyed Mr. Krabs pulls money out of his pocket, goes into the kitchen to make a Krabby Patty, and brings it out all greased up and asks Mr. Krabs if he is going to wash his hands but first, but Mr. Krabs carelessly shoves the greasy Krabby Patty into Incidental 107's mouth; Incidental 107 groans in pain as he holds his stomach.
He is seen in two different physical appearances; when he first arrives at the drive-thru, he is purple, and he orders a meal from the Krusty Krab, but because the window was small, SpongeBob has trouble getting the meal out of the window. He also tries to use a trampoline, but the meal falls on the customer, then he gives Mr. Krabs the bill to pay for his dry cleaning.
He is later seen again in his normal appearance, where, alongside two other fish, is angry when SpongeBob tries to give them the meal.
He appears in the opening shot of the interior of The Famed Bikini Bottom Opera House. He later appears in the crowd when the sea urchin leaves. He then appears when the crowd is shown when Patrick asks how they knew his name. He later cheers with the other audience members after Patrick expresses his preference about his name. He appears again when the crowd has been shushed and a fish says, "Yes, we do."
While SpongeBob and Patrick are advertising the Krusty Krab, Patrick hires him to help. He falls from the sky and writes "Help Me" on a clipboard. Patrick then realizes that idea was not effective at all, as the skywriter is injured and claims to have broken his thesaurus.
He tries to order a Krabby Patty and drink. However, Squidward, who is acting like a baby due to a head injury, makes baby noises, hits his head with a rattle, drools, laughs, and sucks on Incidental 107's hand. SpongeBob peeks his head out of the kitchen windows and tells Squidward that Incidental 107's head is not for eating. SpongeBob then takes a napkin and polishes Incidental 107's hand. Squidward then sucks on Incidental 107's hand. SpongeBob tells Squidward that his hand is not for eating either.
He is seen putting ketchup on his Krabby Patty. He, unknowingly, had an urchin on his Patty but the urchin gets away before he takes a bite. He later overhears SpongeBob talk about the urchin and flees the restaurant.
When Larry opens his gym, he said "You're the lobster, Larry! The Alpha Lobster!" When he is driving by the Krusty Krab, the grill falls on his boat and explodes. Like Fred, he yells "My leg!" but he says he is okay. The grill then falls on him again and he says that he is slightly less okay.