Blue Whales

Blue Whale NOAA_Photo_Library
Adult blue whale (Balaenoptera musculus). Image credit: NOAA Photo Library cc2.0

Blue Whales…

Blue Whale NOAA_Photo_Library
Adult blue whale (Balaenoptera musculus). Image credit: NOAA Photo Library cc2.0

These whales are found in all the oceans of the world, and are the largest and the loudest animals on Earth. In fact, they are larger than the largest of the dinosaurs! They grow up to 100 feet (30 meters) long and can weigh 200 US (181 metric) tons. The blue whale has some of the largest organs in the animal kingdom — its heart, for example, is the size of small car, and its blood vessels are wide enough for a human to crawl through. Its calls are louder than a jet engine, reaching up to 188 decibels, and can carry through the water over 500 miles (800 kilometers)!

Blue whale blowing out water through the blowhole. Image credit: NOAA

Its diet consists of tiny organisms, mostly krill. It eats around 7940 pounds (3600 kilograms) of these per day. The prey is taken in with large amounts of water, and the water is then sieved out through the whale’s baleen (the horny material on the upper jaw). Despite its enormous size, however, the blue whale’s throat is too narrow to swallow anything larger than a beach ball.

Size comparison of an average human and a blue whale (Balaenoptera musculus). Image credit: Kurzon GFDL

Weighing a blue whale is a really tricky task. Adult whales have never been weighed whole — instead, they have been cut up into pieces which are measured separately. This, however, doesn’t give a truly accurate whole weight of the whale, due to the loss of blood and other body fluids.

Blue Whales are also mentioned in:
Top 10 Longest Living Animals.

Blue Whales are featured in the following books:
25 Whales, Dolphins and other Sea Mammals
Whales! An Early Reader Book
101 Facts… Polar Animals

The YouTube video playlist below contains videos about Blue Whales. Details of the videos featured are underneath.

The Playlist:

  1. Blue Whale – Blue Planet- BBC wildlife
  2. Last Chance to See – Blue Whale Spotting – BBC Two
  3. Blue Whale. A blue whale, the biggest animal ever! Taken from the great Blue Planet series by natureprotecters
  4. Worlds Largest Blue Whale colony – Discovered in Sri Lanka by srilankanlion


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