The oceans are a world of mysteries, home to creatures we can't imagine. Prehistory also had some of the most bizarre animals to ever swim the seas. An Elamosaurus swims by. Be careful, these are Dangerous Seas.
Intro rolls
This long-necked reptile is an Elasmosaurus, they belong to a group known as the Plesiosaurs, famous for there necks. They use them like sauropod necks, but this isn't for reaching the tops of trees. Elasmosaurus catches a fish. They are for catching fish. This female is migrating to a nursery, where her future kids will be safe.
The Elasmosaurus swims by an Archelon.
Archelon, the biggest turtle to ever exist, they could grow to about the size of a car. Although they may look like Letherbacks, they are from a completely different branch of the turtle family known as the Protostegidae. Some Baculites are seen swimming.
These are Baculites, they may look like squids but they are actually from a group called the Ammonites. The Archelon eats one of them. They are food to Archelon and many other animals.
The Elasmosaurus swims alongside a Dolichorhynchops.
This is Dolichorhynchops, it too is a Plesiosaur, but unlike Elasmosaurus it has a smaller neck. We see some cinematography.
We then see lots of Hesperornis diving down and catching fish.
These are Hesperornis, aquatic birds. They are one of the closest relative to modern birds. They have adaptations like a long neck and paddle like tail feathers for hunting fish. The Elasmosaurus catches one of the Hesperornis. But they are also a common food source here.
Next we see a Gillicus
Gillicus, a lobe-finned fish. They are weird looking fish, and another common prey item. A Xiphactinus eats the Gillicus.
Xiphactinus, a much larger relative of Gillicus, and equally as bizarre. The Xiphactinus gets swung here and there and dies. Many fossils have been found of Xiphactinus with prey still inside, it's been theorized the prey tried escaping from the insides of the predator killing both.
We then go onto land and see a Claosaurus on the edge of a steep hill (I'm pretty sure where you can see where this is going)
Claosaurus, a Dinosaur. Although Dinosaurs dominated the lands, near the seas is much more dangerous. Claosaurus falls in the water and drowns and is surrounded by Squalicorax.
Squalicorax are a type of Sharks, they are also known as the Crow Shark. The Squalicorax starts taking bites of the Claosaurus. Claosaurus fossils have been discovered here, and have evidence of Sharks feeding on it.
An Archelon gets attacked by a Tylosaurus.
This is the apex predator around here, Tylosaurus. A relative of lizards and snakes. They have a bite-force strong enough to crush the shell of Archelon.
We then see the female Elasmosaurus hinting Xiphactinus and then going up for air. They may be aquatic, but they still need air to breath. Elasmosaurus only put up their head. Elasmosaurus kills a Xiphactinus. She has to eat a lot of food to make sure both her and her kin survives.
The Elasmosaurus reaches the nursery. After a long journey she finally arrives. These are shallow waters, not big enough for any predators to enter. This is a safe spot to raise her young.
Some time passes and we see 5 baby Elasmosaurus. The babies are here and have grown a bit. Some Squalicorax attack. Squalicorax are danger to the young, the Elasmosaurus have to reach the shallows quickly. A Squalicorax almost gets one but is killed by a Tylosaurus. Then a bigger Tylosaurus appears. Tylosaurus don't get along well, and will kill the other. The Tylosaurus fight and the bigger one kills the smaller one and goes up for the air, meanwhile the smaller one sinks to the bottom of the ocean. The ocean is a beautiful place, but it's also mysterious and deadly.
End credits roll
Reptiles dominated the Mesozoic era on the land, skies, and even the seas, but like all thongs it must come to an end. 66 million years ago struck the coast of Mexico, marking an end to the Mesozoic era. A Tyrannosaurus sees the asteroid.
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