Are blue whales blue
What do blue whales look like?
The blue whale has an elongated and streamlined body. Its back is pale blue or gray, marbled with lighter spots. The belly is usually lighter, sometimes even white. Its head is wide and long and can be up to a quarter of its length. Most noticeable, however, is its enormous size. Blue whales can grow up to 33 meters long. A baby blue whale is approximately seven meters long and weighs as much as a full-grown African elephant.
What is your everyday life like?
Blue whales have a long life expectancy of up to 90 years, one known individual even lived to be 110 years old.
Female blue whales have offspring approximately every two to three years. The pregnancy lasts twelve months. The baby stays close to the mother and drinks up to 250 liters of milk a day. Most blue whales are believed to migrate between tropical and polar waters. Generally in winter they swim to the warm, tropical waters of lower latitudes where they give birth to their young. In summer they migrate to the cooler waters of the polar regions to look for food. During the journey, they eat little to no food, for up to four months. Blue whales can communicate with each other over hundreds of kilometers. Their tones are up to 188 decibels louder than a jet plane.
What do they feed on?
The giant blue whales feed on krill, a tiny, shrimp-like creature that can be found in large schools in the ocean. A single blue whale can eat up to 40 million of them in a day. A large amount of krill is ingested and sifted out of the water with the curtain-like beards.
Where do you live?
Before blue whales were severely decimated by whaling, there were an estimated 350,000 of them. Today there are only between 10,000 and 25,000 who live in our oceans. They prefer deep waters and are rarely seen near the coast.
In the northern hemisphere, they can be seen in the northeastern Pacific from Alaska to Costa Rica. You are migrating towards the northwest of the Pacific. Blue whales also live in the North Atlantic, near Greenland, Newfoundland, and Nova Scotia. Small populations still exist in Antarctica and parts of the Indian Ocean.
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