Keith Heartburn is the captain of the ship "The Gizzard", seen in a Sesame Street parody of Deadliest Catch.

Captain Heartburn and his crew of two ride the seas, hoping to find the "Heaviest Catch." With their net, they catch a heavy clam, a heavier fish and finally the heaviest catch - a squid. Due to the squid's immense weight, the Gizzard begins to sink.

The captain and the ship are spoofs of Keith Colburn, captain of the ship "The Wizard," which has been featured in many seasons of the series.