|Home time period||Cretaceous|
|Creature type||Long Neck Plesiosaur|
|Appearances||Episode 7.6 (Extended Cameo)|
Elasmosaurus is a species of Long Neck Plesiosaur from the Cretaceous.
After some time the A.R.C team became aware of the creature in 2013 and started to try and find it and it was identified as a Elasmosaurus. Later when the creature got caught up on the bank of the river when trying to capture fish the team managed to get it free. And the Library owner admitted it was his doing all of this and later the Lock Ness anomaly reopened and the Elasmosaurus went back through.
- The Elasmosaurus is the first ever creature that is a main creature to appear that makes only a small appearance in the episode.