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The Blue Whales Essay

778 words - 4 pages

The blue whale is the largest mammal that has ever inhabited Earth, yet not much is known about this fascinating creatures that roam our oceans. This research examines the physical description and habits of the blue whale, the habitat in which they live in, and the primary threats this endangered species face today. Even though hunting was ban in 1966 by the International Whaling Commission, blue whales are still exposed to numerous threats today, all of which are caused by humans. The population is so low that any further killing may lead to the extinction of this species in the future.
The blue whale is the largest and loudest animal ever known to have existed on Earth. These magnificent creatures can grow up to 100 feet and can weigh more than 200 tones. Their heart is the size of a small car, and a child could crawl through their arteries. Recent studies by the National Geographic Channel suggest that blue whales use vocalization sounds to communicate with one another across the vastness of the sea. This study also suggest that blue whales use their evolved sense of hearing to navigate and to detect food in the depths of the ocean. Blue whales are baleen species, which means they have fringed blades hanging from their upper jaws instead of teeth, called baleen. Blue whales have a mottled gray coloring, however, beneath the surface they appear blue. Blue whales are air-breathing animals yet they can stay underwater for more than 30 minutes.
The blue whale habitat ranges from the Northern Hemisphere to the Southern Hemisphere; they can be found in all major oceans. They are marine mammals that spend their summers feeding in the cold and temperate waters at the North and South Poles, but, during the winter and spring they migrate to warmer ocean waters near the equator along the coasts of Central and South America to mate and calve. However according to marine biologist Asha de Vos, blue whales in the Northern Indian Ocean prefer to stay year-round in India’s ocean and never migrate to the equator. Blue whales prefer the depths of polar waters to take advantage of the high concentration of its krill pray, although, they also feed in the shallow coastal waters. Presently, it is estimated that there are about 5,000-12,000 blue whales remaining worldwide,...

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