In loving memory

Anusha T. T-3

Plesiosaurus dolichodeirus lived 205-65 million years ago from the early Jurassic period to the end of the Cretaceous period in the Mesozoic Era. Her name means "almost lizard." She died in the mass extinction at the end of the Cretaceous period 65 million years ago.


Plesiosaurus loved to eat fish and other small marine life. She hunted by hiding in the deep water where the darkness disguised her so that fish wouldn’t see her. Then, she reached out her long neck and caught the fish in her mouth.

For most of her life, she explored the world. She was about 15 feet long and had a long neck, large body, and small head. Though she could not walk on land due to her inflexible neck and stiff flippers that could not support her body weight, she was able to contribute to the Prehistoric Mapping Foundation by exploring most of the world’s oceans. Her kind lived all over the world's oceans in their time. She was the PMF’s best ocean explorer and will be missed.

Later in her life, she worked at the Prehistoric North Atlantic Marine Hospital delivering babies. Even though she was a reptile, she had much experience with this, since she had her own live young. She also focused on one child at a time, like dolphins and other mammals do.

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Plesiosaurus also had freshwater relatives, who also died in the extinction 65 million years ago. Her cousins were very different then her, though. They were much smaller. They were only about three feet long from head to tail. They also didn't have as long of necks as Plesiosaurus did.

Works Cited

"Plesiosaurs: The Evolution from Ocean Giants to River Minnows (almost)." BBC Walking with Dinosaurs. Web. 14 Apr. 2014. <>.

"Plesiosaurus." DinoPit RSS. Web. 14 Apr. 2014. <>.

"Plesiosaurus." Plesiosaurus. Web. 13 Apr. 2014. <>.

"Plesiosaurus." BBC Walking with Dinosaurs. Web. 16 Apr. 2014. <>.

Than, Ker. ""Sea Monster" Fetus Found-Proof Plesiosaurs Had Live Young?" National Geographic. National Geographic Society, 11 Aug. 2011. Web. 14 Apr. 2014. <>.

Valle, Sabrina. "Oldest Antarctic "Sea Monster" Found." National Geographic. National Geographic Society, 24 Aug. 2011. Web. 11 Apr. 2014. <>.