80% of the earth's biological resources are in the ocean. Without destroying the ecological balance, the ocean can provide 3 billion tons of aquatic products every year and can feed 30 billion people. Among marine aquatic products, people eat the most fish. There are more than 20,000 kinds of fish in the world, and there are about 2,000 species in China's waters. Most of the world's fisheries are located on the continental shelf.
The Atlantic Ocean is between Europe, Africa, America and Antarctica. It is the second largest ocean in the world and the youngest ocean, only 100 million years···...
The Pacific Ocean is between Asia, Oceania, Antarctica and the Americas. It is the largest of the world's oceans. It is about 19,000 kilometers wide from east t···...
The vast ocean, from blue to green, is beautiful and spectacular. Ocean, ocean. People always say this, but many people don't know that the sea and the ocean ar···...
On the earth we live on, there are continents and oceans. And the ocean is much larger than the land. According to calculations by scientists,the Earth’s surfa···...
Since the marine environment is much more complex than that on land, general marine organisms are more fertile than terrestrial organisms, and their methods of ···...
In the marine biological community, starting from plants, bacteria or organic matter, passing through plant-eating animals to carnivorous animals at all levels,···...
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