Godzilla vs. Hedorah

Godzilla vs. Hedorah , Gojira tai Hedora? is a 1971 Japanese science fiction kaiju film produced by Toho. Directed by Yoshimitsu Banno and featuring special effects by Teruyoshi Nakano, the film starred Akira Yamauchi, Toshie Kimura and Hiroyuki Kawase. The eleventh film in the Godzilla series, the film had a strong antipollution message with director Banno being inspired after visiting a polluted beach near Yokkaichi.

The microscopic alien lifeform Hedorah feeds on Earths pollution and grows into a poisonous, acidsecreting sea monster. After it sinks an oil tanker and attacks Dr. Toru Yano and his young son Ken Yano, scarring them both, Hedorahs toxic existence is revealed to the public. Ken Yano has visions of Godzilla fighting the worlds pollution, and insists Godzilla will come to humankinds aid against Hedorah.Hedorah metamorphoses into an amphibian form, allowing it to move onto land to feed on additional sources of pollution. Hedorah is confronted by Godzilla. Hedorah is easily overpowered by Godzilla and retreats into the sea. During the fight, however, several pieces of its new body are flung nearby, which then crawl back into the sea to grow anew and allow the monster to become even more powerful. It returns shortly thereafter in a flying saucer shape demonstrating new, even deadlier forms which it can switch between at will. ........

Source: Wikipedia