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Also known as the "first whale", its fossils were discovered by paleontologists in 1983 and showed that they had an ear bone unique to whales.
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Lived during the late Eocene Period around 41-33 million years ago, thought to be a dolphin by paleontologists because of their resemblance. They weighed around 1,000 pounds and 16 feet long.
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Believed to be an iguanodontid dinosaur but has been reclassified, named in 1840 and named after Squalus shark.
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Became alive in the Oligocene epoch, was a toothed whale and disappeared 10 million years ago.
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Belongs to certacea along with dolphins and porpoises. Divided into two groups baleen and toothed whales, baleen being the biggest largest species of whale and toothed whales using their echolocation to sense their surrounding to prey.
