Incidental CM18

Incidental CM18, also known as Flats' dad, is a character who appears in the episodes "The Bully" and "Mind the Gap." He is the father of Flats the Flounder.

Description
He is a light green flounder who wears a light blue dress shirt, a dark blue tie, and dark tan pants. He has a dark orange mustache and wears a hat that is colored dark tan with a blue stripe. He has two yellow lopsided eyes, and he has lines on his fins.

"The Bully"
When runs away from Mrs. Puff's Boating School in fear of Flats kicking his butt, he runs into Incidental CM18 and tries to get him to help save him. Flats suddenly appears and questions why his dad is talking to a stranger, causing his dad to complain that Flats will kick his butt as well. His butt was later kicked (offscreen).

"Mind the Gap"
He is one of the many patrons at the Blow Your Top Lounge, where he snaps his fingers at the bongo player's performance.