Fightin' Five #41

Dr Aquilla is building an underwater city. He captures the American submarine the U.S.S Plankton. The sub launches a missile that falls into an underwater abyss and awakens a giant prehistoric reptile that is \"The most fantastic sea monster in history\" and\"who was born 250,000,000 years ago\". The monster dubbed \"Junior\" attacks the submarine. Meanwhile The Fightin' Five show up and try to get Junior away from the sub. Enraging Junior by stabbing his tongue, they goad him into destroying Aquilla's city. After capturing Aquilla, they throw a grenade into Junior's mouth causing him to swim off.