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Cryptoclidus was an 26 foot, eight ton member of a plesiosaur genus from the Middle Jurassic period (180-145 MYA) English deposits.

Creature attributesEdit

Physical appearance and biologyEdit

At 4[1]-8 meters in length[2] (13[1]-26ft[2]) with a neck 2 meters long[1] and weighting 8 tonns,[2][3] Cryptoclidus was unlike other plesiosaurs because it had a seal-like body plan. This body-type allowed it to haul itself onto land, though they were rather cumbersome on land than in water.[3]

Cryptoclidus

Cryptoclidus had a skin color that was blend of brown and dark gray with black spots and had a white underbelly.

Behaviour and traitsEdit

Cryptoclidus would come onto land for various reasons. These reasons include to bask in the sun before returning to the water, to rest for the night,[2][3] evade predators, and probably even to breed.[1] Cryptoclidus would hunt anchovy-sized fish,[1] squid,[1][2] and ammonites,[1] such as Perisphinctes.[2] Because of their body size[1], they were ambush predators,[1][2] though they could have searched soft seabead setiments for crabs, worms, and fish.[1]

They were prey for the larger Liopleurodon.[3][2][1]

In Walking with... SeriesEdit

WWD1x3 CryptoclidusOnShore

A pod of Cryptoclidus on the bank of the shore.

Walking with DinosaursEdit

Cruel SeaEdit

Cryptoclidus was featured in the third episode of WWD. It was a stand-in for Plesiosaurus as a plesiosaur. It lived in a small colony, hunted fish underwater and came ashore at night to escape Liopleurodon.

Behind the Scenes Edit

  • Cryptoclidus couldn't go on land.
  • Long neck Plesiosaurs like Cryptoclidus and short neck Pliosaurs like Liopleurodon are now thought to have flukes on their tails, and not smooth lizard-like tails.
  • Cryptoclidus lived from 166 to 164 million years ago so it would not have been alive 149 million years ago.

List of appearances Edit

Notes and references Edit

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 The Complete Guide to Prehistoric Life
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Walking with Dinosaurs: A Natural History: A Cruel Sea
  3. 3.0 3.1 3.2 3.3 Walking with Dinosaurs: Cruel Sea

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