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.
With the development of science, technology, economy and society, people's ability to control, transform and utilize nature has also been continuously strengthe···...
In the distant Antarctic and North Pole, what comes into view is the vast ice caps and snowfields, where is the world of ice and snow. The coasts of Antarctica ···...
The coast where reeds, rice grass, saltwort and other plants grow is called the reed and halophyte coast. The characteristics of these plants are that they can ···...
Under the blue sea, colorful "stone flowers" bloom. Colorful tropical fish happily shuttle back and forth among the stone flowers, roaming up and down. Clusters···...
Mangrove is a forest that grows in seawater. It is a unique forest vegetation growing in tropical and subtropical coasts and intertidal zones of estuaries. Thei···...
Silty coasts are mainly composed of fine-grained silt. Its average particle size is only 0.01-0.001mm. my country's muddy coasts are distributed in Liaodong Bay···...
When the summer heat is unbearable, the best place for people to cool off and relax is the beach. Beidaihe, Nandaihe, Changli Gold Coast, Qingdao Huiquan Bathin···...
A coast with a large number of jade-like stones piled up and down the tidal flats is called a pebble coast. Pebbles vary in size, ranging from larger than goose···...
Coasts made of hard rock are called bedrock coasts. It has clear outlines, strong lines and majestic momentum. It not only has masculine beauty, but also has an···...
Rivers carry a large amount of land material and pour it into the ocean through their mouths. The land material that enters the ocean with river water is mainly···...
The coastline is divided into two types: island coastline and mainland coastline, but the coastline is not a line. This sentence sounds obviously inconsistent w···...
What is the coast? In layman's terms, the coast is the part of the land that is adjacent to the sea. Furthermore, the coast is the narrow area of land above the···...
Peru is located on the southeast coast of the Pacific Ocean, with a coastline of more than 2,200 kilometers. The coast of Peru is a famous fishing ground in the···...
The Gulf Stream is the largest warm current in the world. It is formed by the convergence of the North Equatorial Current and the South Equatorial Current in th···...
Warm seawater near the equator flows to the Arctic and Antarctic seas through circulation, and cold polar water flows to the equatorial seas through circulation···...
As we all know, both humans and animals have blood, and blood vessels are located throughout the body, relying on it to transport nutrients and maintain life an···...
There is a good line in ancient Chinese poetry: "The rain is about to come, and the wind fills the building." Wind and rain are like twin brothers, always walki···...
People have a pulse, and doctors can diagnose the patient's condition through changes in the pulse phase. The sea also has a pulse. Whenever you see the sea, yo···...
Every August 18th of the lunar calendar, people come to Haining, Zhejiang, to watch the tides in droves. At this time, the shore was crowded with people and tho···...
"The moon waxes and wanes," the sea has its ebb and flow, and the water in the sea rises and falls on time every day. In ancient times, people called the rise a···...
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