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Harold is a red-orange fish with chubby cheeks. He is the ex-wife is Martha Smith, and it's possible he and Martha are the family and parents of Tyler. He wears light blue swim trunks. (they sometimes have green flowers on) He is first seen in "Ripped Pants" roasting and eating marshmellows in Goo Lagoon when SpongeBob asked him if he could he borrow some, so he nodded yes. In "New Digs" he wiped his mouth with SpongeBob's underwear. His name is revealed in "To Love a Patty." He also appears to be eating spinach in chocolate spaghetti in Calamari sauce in "Karate Star."