The blue whale is considered to be the largest known animal on earth, with a body length of 33 meters and a weight of 18 1 ton. The blue whale has a slender body and a blue-gray back, but sometimes it looks lighter in water.
Like other baleen whales, blue whales mainly feed on small crustaceans (such as krill) and small fish, sometimes including squid. Usually, blue whales need to feed in the sea above 100 meters during the day, and they can only feed on the water at night.
Blue whales begin mating in late autumn and continue until the end of winter. Female whales usually give birth every 2-3 years. After 10- 12 months of pregnancy, young whales are usually given birth in early winter. The four oceans are distributed.
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Ten habits and skills of whales?
1, whales are mainly divided into two categories, one is toothed whales and the other is baleen whales. Whales cry loudly, but they are also very sad, which may have a lot to do with whale stranding.
Whales don't drink seawater. Instead, they extract water from food by metabolizing fat. Although their specific distribution range varies from species to species, whales live in oceans all over the world. Because whales have a lot of fat in their bodies, they float easily in the water.
Like dolphins, whales are considered to be descendants of land animals. These animals lived on land for millions of years and returned to the water about 50 million years ago. About 50 million years ago, whales walked on land and were about the size of wolves.
4. Whales must often surface to breathe, so only half of their brains are sleeping. Whale earwax shows the age of whales, similar to the way tree rings show the age of trees.
Sperm whales can dive two miles deep, and their bodies have unique physiological adaptability, which enables them to survive under the cold and oppressive pressure of diving. The blue whale is the largest whale in the world and is also considered as the largest animal in the world. Adult blue whales can reach a length of 108 feet and a weight of 200 tons.
6. Because each whale's tail has its own unique characteristics, whale watchers can distinguish different species in the distance. Blue whales are louder than jet engines and can last for 30 seconds. Sperm whales are actually the loudest whales in the world.
7. Whales have no natural enemies except humans. For thousands of years, humans have been hunting large mammals for their meat and other raw materials. Sperm whales sleep vertically in the water with their noses out of the water.
As early as 3000 BC, Inuit used stones, driftwood and other animal parts as weapons to hunt gray whales. For about 40 years, the migration distance of gray whales is equivalent to the distance from the moon to the back.
9. The heart of the blue whale is as heavy as a car, and the tongue of the blue whale is as heavy as an elephant, and its life span in the wild can reach 90 years. At certain times of the year, blue whales can eat more than 4 tons of krill. Baleen whales make low-frequency sounds, and toothed whales make high-frequency sounds. In addition, baleen whales communicate by sound, while toothed whales hunt and navigate by sound.
10.20th century, whalers killed nearly 3 million whales, and almost 90% of the blue whales were extinct. Blue whales have whiter skin than other whales, so they are more likely to get sunburned when they surface to breathe, feed their young whales and socialize. Scientists believe that the ozone hole is increasing the number and severity of whale burns.
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