The film reveals the problems of environmental pollution and biological imbalances facing society in a large number of details. The Victoria River basin in Tanzania, the East African country, is turning into a land of violence, disease and despair.
The cause of the incident dates back to the introduction of the Nile squid as a new species into the Victoria River in the 1960s. The emergence of this fish almost wiped out other fish in the river, because they not only snatched food from other fish, but even Use other fish as predators. Under their ravages, at least 200 species of fish have become extinct on the African continent.
The emergence of this phenomenon is also attributable to the destructive plunder of the river by profit-seeking entrepreneurs and bureaucrats, because the fishing of Nile squid in the river has become an indispensable local economic industry, and many constructions have been built on both sides of the river. In related modern factories, a large number of refined frozen fish are shipped from here to all parts of Europe every day, and those fish heads or other animal carcasses that cannot be exported are sold to local residents for consumption. What is more noteworthy is that environmental pollution and biological imbalances not only occur in Africa, but also occur all over the world. The tragedies that occur in Africa are just a microcosm of similar tragedies that occur every day in the world
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