Elmer the Elasmosaurus

I just saw a Dinosaur Train tv episode today called Elmer the Elasmosaurus. The Dino train had taken the Pteranadon family to an underwater train station, as Elmer the Elasmosaurus was in a water filled train car, and was taken to the underwater train station to return home to his parents. Very interesting that the series had gone underwater for new adventures, however I've noticed Dr. Scott saying a few things about the Elsmosaurus. First, he said that the Elasmosaurus was probably a slow swimmer, and probably used it's long neck for catching fish. Now there's something interesting, as with the flippers on the Elasmosaurus, it would be a rather fast swimmer underwater. Sure it's long neck would be used reach out and the Elasmosaurs could catch fish, but it would also be used a form of self defense form other Elasmosaurus by using it's neck like a whip, and ram it's head onto the body or other part of the Elasmosaurus, or they would bite their enemy with their sharp teeth.  but most of these battles would take place on the surface, as they did need to come up for air. As for  this creature being a marine reptile, I beg to differ on that. Since it lived in the water, it had to come up onto land to lay it's eggs, by digging a hole and burying the eggs in the dirt, but close to water, just as the sea turtles did.  If the Elasmosaurus laid its eggs in the water, it would float to the surface as the ocean was salt water, and the eggs were very dense.  Sure with the flippers it would've been difficult for it  to walk onto land,  but I'm sure it managed to slide onto the shore for its egg laying , just like the sea turtles did, as they also have flippers, and managed to  crawl onto the shores of the beach. I'm sure it probably wasn't easy for her, but she managed to do it. And when the eggs hatched, they made their way to the ocean as the same way the baby sea turtles do.  So the underwater adventures are good, but is glass tubing a safe way for the dino train to travel underwater like that? Perhaps it should've stopped at a station, where they would switch to the underwater dinosaur train submarine to continue their underwater journey to the underwater station. And then released Elmer into  a special water pool that would be connect him to the ocean. Just a thought.