The Blue Whale is the largest and loudest animal that's ever lived on Earth. These gigantic mammals eat small, but live large and are in danger of becoming extinct. Whales in this suborder lack teeth. Instead, they have stiff, hairlike baleen plates that hang from their upper jaws and filter food and water. The Blue Whale is considered to be the largest animal that's ever inhabited the earth.
Fossils indicate that the Blue Whale at one time, grew to more than twice the size it does today.
During the late 19th century, this whale was hunted to near extinction by whalers in search of blubber. Whether or not the whale will be able to survive well into the future is still unknown. The Blue Whale is the largest known animal in the world and probably the largest animal that has ever lived. The largest specimen ever found was female weighing more than 174 tons and measuring some 94 feet in length. Female whales are generally much larger than their male counterparts, with an average weight of 150 tons and measure 80-90 feet in length.