Still alive 200 million years ago

At this time, the overlords of freshwater rivers were the phytosaurs with inlaid anklets. As we all know, big rivers always flow to the ocean, and the phytosaurs that have dominated freshwater for more than 20 million years are naturally not willing to just stay in the small freshwater. Their journey is A sea of ​​stars.

The Triassic mass extinction plowed through all the prosperous pseudosuchians and phytosaurs. Phytosaurs became extinct, and lizards became extinct. Only a single seedling of the crocodile-shaped superorder Pseudosuchus remained, which was the crocodile group in later generations.

After all, the crocodile is the last descendant of the royal family. Although it is a marginalized ethnic group in the corner of the horn, after the pseudo-crocodile and the plant dragon were all wiped out, it naturally became the only remaining royal bloodline of the mosaic ankle species.

The crocodile-shaped superorder was unable to prevent the great rivers and mountains from being taken away by the cunning anti-thief dinosaurs, so they could only tearfully retreat to the freshwater land of Phytosaurus, and rapidly evolved and developed.

In the early Jurassic, crocodyliforms began to move into the ocean and evolved into the marine crocodile suborder, which was only more than 10 million years ago during the Reti period.

You must know that the crocodile-like superorders at that time had just taken over the inheritance and began to go to the sea for more than 5 million years. There is no reason why the phytosaurs that had been occupying the rivers for more than 20 million years did not appear in the sea.

Xu Dong once had this doubt when he read about the history of crocodiles. Now he saw these specialized phytosaurs entrenched in the estuary and knew that phytosaurs had also tried to enter the ocean.

These chopstick-mouthed and pulp-tailed phytosaurs were confronting a group of ichthyosaurs at the boundary between fresh water and sea water.

Xu Dong could only recognize that this group of ichthyosaurs belonged to Sasta Ichthyosaurus, but he didn't know which category it was. It was strange, why did these big guys come here?

You must know that the sea today is no longer what Xu Dong saw back then. With the emergence of predatory ichthyosaurs, the former kindergarten has evolved into a hot-blooded college, full of killing, predation, and involution.

The representative of the Sasta Ichthyosaurus, the Himalayan Ichthyosaurus, is the well-deserved top overlord of the ocean, an invincible existence similar to a killer whale.

The question is how did Sarstichthyosaurus come into contact with these sea plant dragons and start a group fight?

Not to mention, Xu Dongzhen guessed it right. Animals all have their own territorial awareness. The original dividing line between sea plants and saster ichthyosaurs was the dividing line between sea water and fresh water.

But the sea phytosaurs are obviously no longer satisfied with staying in the seaport. They also want to go to the sea to develop. For this reason, they have even evolved a paddle-shaped tail suitable for underwater swimming.

However, in this ocean at the end of the Triassic Period, the strong ones have already stood out. The ichthyosaur has grown from kindergarten to a hot-blooded college, and the finned dragon has grown from extremely desperate to extremely brave. The two eldest brothers are sitting there, how can there be sea crocodiles? room for development.

The target of this group of sea plant dragons to go to the sea is the territory of Sasta Ichthyosaurus. If they want to go to the sea, they will have to fight with this group of Ichthyosaurus.

Today's war, as they have been fighting for many years, is neither big nor small.

But from the fact that Hai Zhilong can still only nest at the mouth of Tamsui River, we can see who the winner of countless wars is.

Freshwater crocodile VS sea ichthyosaurs, a rare good show, Xu Dongfei watched the battle with great interest in the air. At this time, the Sasta ichthyosaurs were at their peak, and their invincible Himalayan ichthyosaurs were climbing proudly, and many small predators Ichthyosaurs are simply incomparable.

Although this batch of Sasta Ichthyosaurus does not come from the genus Xiyu, at least it comes from the same family, and it is also very capable of fighting.

After all, Haizhilong is a freshwater native and a rookie in the ocean. Ichthyosaurus is definitely not their opponent in fresh water. Of course, ichthyosaurs will not go to fresh water. Every time Haizhilong enters the ocean, it loses its home field advantage and encounters As the top powerful clan in the ocean, failure is inevitable.

A six-meter-long sea plant dragon was swimming in the water, and the underground tide was raging. A ten-meter-old Sasta Ichthyosaurus jumped out of the water and hit the sea plant dragon with its huge body. It was huge. The force of the attack instantly knocked it unconscious, and it was pushed into the sea by the Sarst Ichthyosaurus and was eaten by many fish and dragons.

The sea plant dragon on the other side opened its long, chopstick-like mouth and bit down on the tail of the ichthyosaur. Unfortunately, its chopstick mouth had the most bite force to eat fish and could not deal with large creatures at all. It was no match for the other two types of the same species. Same thing.

As expected, the tail of the ichthyosaur was not bitten off this time. Instead, it was dragged into the sea by Sasta Ichthyosaurus. When it entered the water, it was the world of ichthyosaurs.

As you can tell from the name, Ichthyosaurus is as flexible as a fish underwater. How can Haizhilong fight with Ichthyosaurus? Add one to the loss of a member.

Under constant attack and attack tactics by ichthyosaurs, the large number of sea plant dragons were dragged into the water one by one and killed like lambs waiting to be slaughtered.

At this time, heroic units are needed to come to the rescue. Under the sea water, or even under the sea layer where the ichthyosaurs are located, it is theoretically impossible for the plant dragons to dive so deep, but there is such a special case, with a long head The twelve-meter-long giant crocodile lurks underwater and waits for its opportunity.

When the Sarst Ichthyosaurus relaxed their vigilance and focused all their attention on how to play and kill the plant dragons on the sea surface.

It moved! As quiet as a virgin and as active as a stray rabbit, this huge plant dragon bit into the tail fin of an ichthyosaur with lightning speed, and with the powerful bite force, it instantly bit it off.

Then it didn't pursue it, but tried its best to destroy the fins, tail fins, and dorsal fins of the ichthyosaurs that were showing off their power in the sea, causing them to lose their biggest advantage, speed!

How can an Ichthyosaurus without its speed advantage fight against a thick-skinned Phytosaurus?

Suddenly, the battle on the sea surface took a turn for the worse, and the ichthyosaurs began to fall into the massacre of the sea plant dragons. The corpses of the ichthyosaurs surfaced one after another, attracting many flying insects and predatory fish.

The huge Phytosaurus underwater and the Sea Phytosaurus on the surface cooperated tacitly, compressing the space between the fish and dragon step by step, using encirclement and annihilation tactics.

Xu Dong was astonished when he saw it. He originally imagined that the sea crocodile fighting fish dragon would be biting and impacting with real swords and guns, fighting for weapons, combat power and endurance. Who knew that these guys are better than each other in terms of tactics? Thief 6.

Finally, the giant crocodile that was stirring up wind and rain under the water came up to take a breath, and Xu Dong also got a glimpse of its true appearance. Good guy, Xu Dong gasped as soon as this big plant dragon surfaced. It was so big!

Wait, why does it look familiar?

Isn't this the Jiucha River crocodile demon I saw before? How did it get into the sea?

The huge Redonda dragon raised its head and glanced at Xu Dong. It snorted for fresh air and dived down again. This time it wanted to kill all the Sarst ichthyosaurs and extend the blood of Zhilong to the sea. It wants to conquer this blue land.

Woo——

A loud and long cry came from a distance, and the originally blue sea was instantly covered with black. This was an extremely huge fish swimming from the water. Is this?

Small theater of paleontology: Sasta Ichthyosauridae lived in the Triassic Period 235 to 235 million years ago. They had relatively large skulls and slender mouths, and had no dorsal fins or very small dorsal fins. The Saaster Ichthyosauridae is also the largest of all ichthyosaurs. The Saaster Ichthyosaur of Sikani found in western North America can grow up to 21 meters long. Most of the Saaster Ichthyosaurids are fish and other fish. Feeds on small aquatic animals, such as ammonites. The family Sasta Ichthyosaurus includes: Sasta Ichthyosaurus and Himalayan Ichthyosaurus.

Sauriformes - Dipsids - Ichthyosaurs - Ichthyosaurs - Ichthyosaurs - Sarstichthyosauridae