Frank is a character in SpongeBob SquarePants.
He is a light brown colored fish with a light tan-striped dorsal fin. He has orangish-brown lips and wears a red shirt. In "Chum Bucket Supreme" when he is approaching the register at the Chum Bucket, his shirt is red. At the next shot, the shirt is blue, and in "Free Samples," when he says "Did he said it was good?" his shirt is pink.