Scientifically known as Balaenoptera musculus, blue whales weigh as much as 33 elephants, have a heart the size of a car and are full-size basketball court long. But also, many whales (including humpbacks, sperm whales, and blue whales) are the prey of the orca. Antarctic blue whales are not only the biggest animals on the planet, they’re the largest that have ever existed. Blue whales, at the top of the food chain, play a significant role in the health of the environment. ... Blue whales and krill. They have a distinct ridge along their back behind the dorsal fin, which gives it the nickname "razorback.” Fin whales have a very unusual feature: the lower right jaw is bright white and the lower left jaw is black. Today, there are about 10,000 to 25,000 blue whales alive in the oceans, making them one of the most endangered whales. Antarctic Blue Whale and Krill Voyage 2019. Scientists have discovered that by counting the layers of a deceased whale's waxlike earplugs, they can get a close estimate of the animal's age. In particular, increasing maritime traffic, expanding aquaculture, and overexploitation of marine resources have seriously degraded its habitat in Chile's Patagonian fjords. 11 facts about blue whales, the largest animals ever on Earth The blue whale, is the largest animal ever known to have lived on the planet. While international agreements and national laws have pulled the blue whale back from the brink of extinction after centuries of commercial whaling, the world's largest animal still faces a host of threats. Top 10 Endangered Species of Whales, complete explanation about how many endangered whale species left which lived in oceans all over the world. ... Antarctic Blue Whale and Krill Voyage 2019. Blue whales are among Earth's longest-lived animals. Blue Whales live in all the worlds Oceans, but there aren't many left. Despite the fact that blue whales have a global distribution, they are sparsely populated around the world. Their tongue weighs as much of an elephant. Despite many protections including a moratorium on whaling since 1986, many species of cetaceans continue to be threatened – with some on the verge of extinction. World’s largest mammal, Blue Whales, less than 25,000 left in Earth’s oceans added by DiMarkco Chandler on October 16, 2012 View all posts by DiMarkco Chandler → There are over 80 species of cetaceans, a group made up of whales, dolphins and porpoises. ... Blue Whale is the largest animal that ever existed on the entire Earth. Blue whales and krill. Adults reach more than 30 metres in length, 100 tonnes in weight, and live for more than 80 years. Learn more about whales and dolphins and what we can do to protect them. Antarctic blue whales are not only the biggest animals on the planet, they’re the largest that have ever existed. The best estimates from the International Whaling Commission indicate that there are roughly 1.7 million whales in the world. Adults reach more than 30 metres in length, 100 tonnes in weight, and live for more than 80 years. Next to the blue whale, the fin whale is the second largest mammal in the world. However, it is impossible to count the number of whales or any other ocean-dwelling creature accurately, and thus, the real number of whales in …