Synopsis

News of the legendary pearls of Puplantis spurs Mayor Humdinger and the Kitten Catastrophe Crew to launch a mechanical shark for the underwater city. As the Crew creates a distraction, Humdinger assumes the identity of a mer-pup named Merdinger, hoping to reach the colossal clam responsible for the pearls and claim a coveted purple one. When chaos erupts in Puplantis, Coral summons the PAW Patrol for assistance.