Incidental 68

Incidental 68, also known as Incidental K5 and Fish A is a background character who usually makes cameo appearances, starting with "Pickles."

Description
He is a light blue barracuda with faded blue fins and lips, and has black eyes. He wears a light yellow shirt and brown pants. In older episodes, the end of his mouth was pointy, his dorsal fin was spiky and he didn't wear pants.

Role in series
Incidental 68 is a somewhat common incidental character in the series, he hasn’t spoken much, but has had several notable & speaking roles.

"Christmas Who?"
He is seen with Incidental 37B, when everyone angrily believes that Santa Claus is a fake.

"Picture Day"
He is one of the teenagers who chase SpongeBob with water balloons.

"Karate Star"
He is seen as one of the ice cream men.

"Glove World R.I.P."
His shirt files off while riding a ride.

"SpongeBob LongPants"
He appears as a child with Incidental 63 as his mother, when just got his long pants and has entered the Krusty Krab. Everyone looks at SpongeBob because of his long pants and he points at him and asks his mother if SpongeBob is his father. She says she wishes he was as she stares at SpongeBob more.

"Larry's Gym"
He is one of the customers who fills out a membership form for Larry's gym.

"The Goofy Newbie"
He waits in line at Goofy Goober's Ice Cream Party Boat, annoyed by, who just keeps sampling different ice cream flavors.