Jonathan Bird's Blue World - Season 4 Season 7 Episode 12 Cave Bells in Mexico + Massive Bumphead Parrotfish in Palau

In a remote cenote in Mexico, Blue World investigates mysterious formations called Cave Bells, which are only found in seven cenotes in the world, all within a few miles of each other. Then the team travels to Palau to witness the spawning ritual of the massive Bumphead Parrotfish.