Frank is a dark olive-green fish with light olive-green arms, legs, and an underside. He wears a light blue shirt, dark brown pants, and purple slippers. He has short dark gray hair and wears an eye patch on his left eye.
Role in series
"Pranks a Lot"
Frank shows SpongeBob and Patrick many prank items he owns after shocking Patrick with the joy buzzer. He also shows them Exploding Chewing Gum, a fake dollar, a whoopie cushion, fake vomit, real vomit, and finally he sells them the Invisible Spray.