S1·E75 Cheyenne the Water Country(Part One)

"Heed our requests or we'll blow you up!" Those were the words that came from a planet that even Maetel didn't know that forced the 999 to make an unscheduled landing. The people on the planet mostly live underwater. The one who issued the order to land was the president of an underwater race which had emigrated there, Waterpress. These people had polluted the water as much as they could and continued to fight against the planet's natives, the Cheyenne Fish...