An Elasmosaurus. An Elasmosaurus is a dinosaur known for its very long neck. It is a kind of plesiosaur. It is known to swim in the water, but it was a very slow swimmer. It used its neck to grab food from the ocean. Transformers With That Beast Mode Magmatron (nicknamed Seasaur) Paddles Retrieved from "https://beastwarstransformers.fandom.com/wiki/Elasmosaurus?oldid=6860" Categories: Animals Community content is available under CC-BY-SA unless otherwise noted.