70% of the earth's surface is covered by water, so the alias is also called "blue earth". The depth of the sea bed is about 8,000 meters, and the land area is sometimes below 500,000 meters. There are many types of fish and plankton living here. In the winter of the Arctic and Antarctic, the temperature will drop to minus 70°C or below. The water temperature on the sea is also extremely low. Most of the creatures living here cannot withstand the severe cold. The weather will temporarily move to shelter from the cold.
The underwater world is dark all around, and sunlight cannot directly shine, making it impossible for plants to survive, but this invisible place is home to fifty kinds of creatures that have never been seen before, and even biologists don't know their names. In the endless ocean species, the deeper you go, the more peculiar species of creatures
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