This novel uses the popular POV mode to describe a global crisis through the interactions between four people from different countries and different backgrounds, and the ocean, animals, and people.
Plastic waste all over the ocean, cancer raging wildly, the human living environment being squeezed, suspicion and betrayal between people... These crises are not happening in the future, but have already existed between you and me. Although this is a science fiction novel, the content mentioned, mutated bacteria, exploding cancer cells, and creatures that straddle organic and inorganic matter, may not necessarily exist in the future.
Maybe, the things mentioned in the novel have happened long ago.
But we haven't noticed it yet.