They are also absent from some regional seas such as the Mediterranean, Okhotsk and Bering. Wow! A baby blue whale will live off its mother's milk for the first 6 months, at which point it will have grown its baleen plates so it can eat krill. Blue whales occur worldwide in all major oceans except the Arctic. It will gain around 200 pounds a day and be about 50 feet long at the age of 6 months. When the baby is born it is as large as an elephant and grows very quickly. Some have yellowish bellies.Ī baby blue whale is called calf. Blue whales are light bluish gray on their dorsal side and mottled gray whitish on their bellies. They can weigh over 200 tons or 400,000 pounds! Female blue whales are generally larger than males, and northern hemisphere blue whales are generally smaller than those in the southern hemisphere. In the Antarctic, blue whales have reportedly reached lengths of 110 feet, but most probably grow to between 80 and 90 feet long. A blue whale aorta (the main blood vessel) alone is large enough for a human to crawl through. A blue whale heart is the size of a small car and pumps 10 tons of blood through the massive blue whale body. of food to fill a blue whale's stomach.īlue whales are simply enormous. of krill a day during its peak consumption period. Their main diet is krill (euphausiids) and copepods. They can grow up too 100 feet (30.5m) and weigh around 160 tons. To eat, blue whales filter their food through stiff, bony, comb-like teeth called baleen plates. Blue whales are the largest baleen whale and the largest rorqual.
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