On this issue, according to historical records, his name is black dragon and he lived on land for nearly 654.38+0.5 billion years. But in the late Cretaceous, the last stage of the dinosaur era, some of them migrated to the sea to live and rose to the top of the food chain. Paleontologist Bosin said that they started with small animals like Dallas lizards and gradually dominated the new marine environment. Finally, they became the tallest carnivore in the ecosystem and the Tyrannosaurus Rex in the ocean.

Secondly, there were many overlords in the dinosaur era, because the dinosaur era was really too long. From Triassic to Jurassic 230 million years ago, and then to the late Cretaceous 65 million years ago, it actually spanned nearly 65.438+600 million years of geological history, so in such a long time, many overlords appeared, and ichthyosaurs first appeared 250 million years ago, a little earlier than dinosaurs. More interestingly,

Most kinds of ichthyosaurs are not big. Their heads are like dolphins, and their mouths are full of teeth. Similar to modern tuna, ichthyosaurs are very similar in structure to whales and their bodies. It also breathes the lungs. But their reproductive patterns are similar to those of sharks, and they are all derived from oocytes. Ichthyosaurs have streamlined bodies, and they are also very suitable for living underwater.

About 1992, Canadian ichthyosaur scientist Elizabeth? Nichols' team found a 23-meter-long ichthyosaur in West Canizar, which was actually human. The largest ichthyosaur species discovered so far, the staple food of ichthyosaurs is generally fish, and their taste and teeth are very strong. Some small reptiles may also be included in their diet. Ichthyosaur's eyes have corneas, which can be captured at night.

The question of what dinosaurs the ocean overlord would have in the dinosaur era is explained here today.