An English essay about the blue whale

The blue whale is the largest mammal in the world, distributed all over the world. It is about 30 meters long and weighs about 170 tons. You can open it to the width of 10 adult with one mouth.

The blue whale's back is light blue, and its abdomen is wrinkled with ochre spots. Its tail is wide and flat, and it can swing freely and flexibly in the water. It is not only the driving force, but also the rudder, which can reach 27 kilometers per hour. The predation mode of blue whales is "swallowing", and the main food is plankton such as shrimp, jellyfish and diatom. It often opens its mouth on the surface of the water and swallows shrimp together with seawater, then closes its mouth to filter out seawater and swallows shrimp into its abdomen. A blue whale eats about 4 tons of krill every day.

If the food in its stomach is less than 2 tons, it will feel hungry and panic, as if it will never be full. So it often dives into 30 to 40 meters of water to find food. Because I stay in the water for a long time, every time I float to the sea for air, I will spray a water column as high as 15 meters from my nostrils, which looks like a clear spring from a distance. The blue whale is very powerful, which is about equivalent to the pull of a medium-sized locomotive.

Blue whales breed in winter. The mother whale was pregnant for one year before giving birth to her calf. This newborn whale is about 7.5 meters long and weighs about 6 tons. After feeding for 24 hours, its weight can increase by about 65,438+000 kilograms, with an average increase of about 75 grams per minute. After seven months of breast-feeding, the calf can reach about 23 tons in weight and about 16 meters in length, and it begins to learn to swallow all kinds of plankton with its mouth open. Baby blue whales don't reach adulthood until they are 5 years old, and their life span is about 20-30 years.

The blue whale is full of treasures, and its fat can be used to make soap; Whale meat is rich in nutrition; Whale bone can extract colloid; Whale liver contains a lot of vitamins; Blood and viscera are high-quality fertilizers. Therefore, blue whales have been repeatedly killed by humans. Now, the number of blue whales is declining sharply, almost to the brink of extinction.

Blue whale is a large mammal in the world, which breeds in various marine areas around the world. Its height can reach about 30 meters and its weight is about 170 tons. It can be opened to accommodate 10 adults freely.

The back of the blue whale is light blue, and the abdomen is covered with folds and yellow spots. Its tail is wide and even flat, and it can swing freely and flexibly in the water, which not only propels power, but also acts as a rudder, with an hour of up to 27 kilometers. The predation mode of blue whales is "in groups", and the main food is plankton such as shrimp, jellyfish and diatom. It often opens its mouth wide on the surface of the water, swallowing shrimp and seawater together, then closes its mouth to filter out seawater and swallow shrimp into its abdomen. Blue whales must eat about 4 tons of krill every day.

If the food in its stomach is as little as 2 tons, it will always feel nervous because of hunger, as if it is not full. Therefore, it often dives into the water depth of 340 meters to find food. Due to long-term treatment in water, every time I float to the sea level for air, I will spray a water column as high as 15 meters from my nose, which looks like a clear spring from a distance. The strength is great, and the possibility is equal to the pull of a railway engine.

Blue whales breed in winter. The mother whale didn't survive until a whole year later. The newborn calf is about 7.5 meters long and weighs about 6 tons. After 24 hours of nursing, its weight will increase by about 100 kg, with an average increase of about 75 grams per minute. After 7 months of nursing, the young whale can weigh about 23 tons, and its body length is about 16 meters, and it begins to learn to swallow all kinds of plankton with its mouth open. The baby blue whale will not grow up until it is 5 years old, and its life span is about 20-30 years.

The blue whale is valuable all over, and its fat can be made into soap; Whale meat is rich in nutrition; Whale bones can extract glue; Whale liver contains a lot of vitamins; Blood and organic matter are also high-quality fertilizers. Therefore, blue whales have repeatedly forced humans to capture and kill. Now, the number of blue whales is declining sharply, almost to the endangered area.