The ocean, which covers 70% of the earth's surface, is my favorite, magnificent, mysterious and awe-inspiring.
With the development of human society, the oceans and creatures are all under threat. Two days ago, someone said that the Baiji dolphin was extinct. Whether the news is true or false, it is heartbreaking. It is sad for our children and grandchildren.
Fortunately, there are photographers who risked their lives to film this documentary, taking us from tropical oceans to extremely cold waters to meet those mysterious underwater creatures and their partners and enemies.
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