Kagaku ninja tai Gatchaman

The sea takes up 70% of Earth. Galactor makes Nambu and the Science Ninja Team chose between their lives and pollution of the seas by PCB. Pretending to agree, the God Phoenix goes to the pre-defined area in the sea, but when they blow up the approaching mini submarines, the pollution matter streams out and the Tarushia Sea ends up polluted. Ken discovers three tankers which seem to control the mini submarines and, using the mini submarine loaded into the God Phoenix, sneaks in. There, cleaning work is done for the returning mini submarines. Ken is discovered by Galactor. He defeats them and heads towards Katse's whereabouts, but in the meantime the tankers have transformed into one huge tanker which emits a magnetic force attracting the God Phoenix whose hull starts to crack. Ken pulls the control lever. Katse, activitating the self destruct mechanism of the tanker, escapes into a passageway beneath the floor. Ken pursues him, but Katse escapes in a rocket. Ken and the Galactor members go out into the sea, but the pollution matter flowing out of the tankers is approaching them. The Galactor members each die as they touch the pollution matter. By a hair's breadth, Ken is picked up by a mecanical arm outstretched from the God Phoenix and thus escapes the danger. Soon, the Galactor cleaning capules are released into the sea and it gets back its former beauty.