Nuclear Sewage Discharge, Global Biological Mutation!

In 20xx, a certain country discharged nuclear wastewater directly into the sea, regardless of the obstruction of other countries. I originally thought that this incident would pass soon, but I didn't expect that it would become the beginning of mutation. Because a certain country was the birthplace, in less than half a month, the whole country turned into monsters who only killed without thinking. In order to destroy them, we can only tearfully destroy the entire country with artillery shells. Human beings in other countries have also been exposed to radiation, and their bodies have also undergone changes. All creatures around the world undergo horrific mutations. Sharks that can fly in the sky, sharks that can walk on land. A turtle covered in barnacles and with numerous mouths. A war between humans and animals begins. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.