An important symbol of marine ecosystem-whales. Whale is a key indicator of a healthy marine ecosystem and plays a vital role in it. However, due to its huge economic value, it has been the target of human hunting since ancient times, and many species are on the verge of extinction, and some have become extinct.
blue whale
The blue whale is the heaviest and largest creature on the earth at present. It has to eat about 4 tons of small fish and shrimp every day to maintain its body shape of nearly 200 tons. It was not until 1960 that the international whaling commission realized the seriousness of the survival of blue whales and began to ban the killing of blue whales. By this time, 350,000 blue whales have been killed, leaving less than 50 blue whales in the world. After decades of hunting, the blue whale was finally protected in 1966. But their numbers recovered slowly, and now blue whales are still in danger. Blue whales can migrate from the ocean poles around the world.
whale shark
Whale shark is the largest fish in the world, with a huge body and a total length of 20 meters. Light spots and criss-crossing light bands are scattered on the body surface, like a chessboard. The nose is located on both sides of the upper lip and appears in the mouth. Teeth are many and small, arranged in rows. It belongs to marine fish. Eat a lot of plankton and small fish. Mainly distributed in tropical and temperate seas, and distributed in all seas of China in summer and autumn. Mild temperament. Due to a large number of killings, the number has dropped sharply.
Sea otter:
? The sea otter is 130- 150 cm long and weighs about 40 kg, which is slightly lighter than people. The tail is 30-40 cm long, and the male is slightly larger than the female. The forelimbs are short and bare, the hind limbs are long and flat, and there are fins between the toes, which are suitable for swimming and diving. They are distributed in the cold waters of the North Pacific. The fat under the sea otter's skin is very thin, but its fur is extremely thick, reaching 6.5438+0.25 million hairs per square centimeter of skin, which is also the highest in the animal kingdom. Fur is the most expensive thing on sea otters. /kloc-in the 0/8th century, when people discovered the function of sea otter fur, humans began to kill sea otters on a large scale, which led to the extinction of sea otters now. By 19 1 1 year, there were only 1000 heads left in the world, which were later restored after protection.
Little dolphin
The capuchin porpoise is the most endangered cetacean in existence. As early as 1997, their number was about 600, and in 20 14, it became about 100. In the following years, its number decreased by 30-40 each year to 20 18.
Elk horn coral
Elk horn coral is a rare creature mainly distributed in Caribbean waters, which is hard to see in other waters and is currently facing the crisis of extinction.
Leatherback turtle
Leatherback turtle is the largest species of all living turtles. Its speed in water is almost 22 miles per hour, which makes it the fastest reptile in the world. It is said that leatherback turtle appeared 6,543.8+billion years ago, and now it has become a rare marine animal and is listed in the red list of endangered species.
I hope all marine life can roam freely in the blue sea, instead of being displayed in museums. I hope that mankind and all life on earth can live in peace and enjoy the sunshine and rain.