— Incidental 81, "Doing Time"
Incidental 81, also known as Old Fish B and Motorist, is an incidental character who first appears in the episode "Mermaid Man and Barnacle Boy." He is likely to be classified as an "elderly" type incidental.
He is a light beige elderly fish with a big light gray beard and wears a light blue hospital gown. He only has three hairs on his head, a visible vein on his forehead, and three irregular faded orange spots at each side of his head.
Old Fish B
He is an elderly beige fish with pink lips, dark teal fins, and a gray beard. His eyes are large and round and colored blue with black irises. He wears an army green hospital gown and has a bamboo cane.
He appears as Old Fish B driving a basic red and white boatmobile.
Role in series
Incidental 81 has not made too many appearances in the series much like most elderly incidentals due to normally being portrayed as a resident at Shady Shoals Rest Home.
He finishes a memoir of his life in red ink, but the red punch soaks the memoir, and due to it being red, makes his writing unreadable.
He is seen on a show SpongeBob is watching at the beginning of the episode where Incidental 47 reveals to her boyfriend, Jason, that she has a crush on Incidental 81. Jason then calls Incidental 81 his grandpa.
He is seen alongside the elders who whack Plankton while he is trapped in a net.
He appears as one of the blue soldiers filling their cannon with filth.
He is one of the elders featured in the Shelly Superhighway parade.
He is seen at a retirement home playing cards with Incidental 92 while the train was about to crash into them.
He accidentally squishes Plankton with his walker.
He is one of the elderly fish in the Bikini Bottom Police Department evidence room.
A starving Incidental 48 is seen chewing on his beard.
Major roles in The Patrick Star Show
He is part of the Flying Dutchman's commercial where he is seen struggling to do a bench press with Incidental 24, Incidental 24A, and Incidental 32 mocking him until a ghost possesses him and grants him super strength. He then tosses the barbell onto the three muscular guys.
Major roles in games
He appears as Old Fish B.