How heavy are the blue whales in the deep sea?

Adult blue whales are about 150 to 250 tons, and their body length is about 30 to 35 meters.

The blue whale is the largest species among baleen whales. The oldest whale is a female whale caught in Antarctic waters between 1904 and 1920. It is 33.58 meters long and weighs 170 tons.

The blue whale is the largest animal that has ever lived on the earth. The largest known creature in the dinosaur era is the Mesozoic Argentinean dragon, which is estimated to be 90 tons (100 short tons). The weight of the largest blue whale is uncertain. Most of the data are taken from blue whales killed in Antarctic waters in the first half of the 20th century, and the data are measured by whalers who are not proficient in standard animal measurement methods.

Blue whales are smaller than those living in the waters near Antarctica, which is generally considered to be closely related to the variety and quantity of their food. Blue whales feed on plankton, mainly krill. A blue whale consumes 2-5 tons of food every day. Swimming speed is 2-6 km/h when feeding, 5-33 km/h when migrating and 20-48 km/h when being chased.

General 10-20 small dive is followed by big dive. Shallow dive interval 12-20 seconds, deep dive sustainable 10-30 minutes. The spray column is narrow and straight, with a height of 6- 12m. Krill is the main food of blue whales, and the plankton eaten by blue whales belong to different species according to different marine areas. In the North Atlantic, northern krill is the main food of blue whales.