Time through the three epochs, in the fear of being dominated by arthropods, fish evolved huge size and very lethal teeth, arthropods have declined, at this time, the first vertebrate king appeared, it is covered in head armor, with a largely open jaw, the size of the monster is the largest predator of the same period, it is the predator old Deng head "Dun's fish"
The Devonian period was a period of rapid development of vertebrates, especially the bony fish and the bonefish reached an unprecedented empty period.
In the Devonian Period, the continent appeared tall, dense, scattered, grassy, during this period the gradual emergence of land vertebrates, titalik fish evolved to become the ancestors of the first vertebrates
Speaking of the overlord of the Devonian Period, understand all understand, Dun's fish can be said to be a major turning point from arthropods to fish domination, announcing that the rule of jawed fish is about to open, the shield fish family is very large, squeezing out the arthropods that once ruled the ocean from the ecological niche, of course, the huge size is essential, The Dunn's fish was considered to be 11 meters long in the early days, of course, only Baidu satellite, here to say, want to see the species population and size is recommended to go to bilibili, because most of the data of Baidu entries is not official, Because a level four number can modify the data.
Since the size of the body shrunk 6 meters, was black very miserable, big head eel tail, even can not beat the great white shark, tiger shark.
However, it is currently believed that the body structure and appearance of Dun's fish are not as backward and primitive as we think, because the gate plate of Dun's fish replaces the teeth, which can be rubbed up and down when biting, and can be compared with some predators now.
As for the appearance and body shape, it will not be considered to be an eel tail tadpole, because even flexibility is a big hard injury, catching prey is also a problem, according to the newly restored Dun's fish by foreign scholars in 2017, the torso is thicker and hugged
There are pelagic predatory fish tail fins, the size is also larger, nearly 9 meters, because the Dunn's fish dominates such a high ecological niche, this feature is indispensable, no one will currently think that the Dunn's fish is a big-headed tadpole eel tail, unless he has seen the real Dunn's fish, or leave it alone.
8.8 meters regular restoration
In this way, the flexibility and speed will be greatly improved, will it not be able to beat the great white shark?
Born to create a miracle, this Dunn's fish set its sights on a trilobite, used its powerful bite force to bite it to death and eat it.
In the middle of the Devonian Period, the earliest shark slit sharks and full-headed subclass pectoral ridge sharks appeared, for which the Dunn's fish was a monster Fortunately, flexibility and speed prevailed, otherwise it would have become a delicacy for others.
The Dunn's fish saw a pair of lungfish that were mating, and it was not very good to bother at this time.
Dunn's fish sneaked past from the blind spot of sight, and when it was about to approach, the female lungfish escaped, and the male died directly on the spot, unlike biting the prey with his teeth, the tooth plate of the Dunn's fish directly bit off its spine, and the tooth plate could be rubbed up and down
At the end of the Devonian Period, due to the eruption of submarine volcanoes, a large number of toxic gases spread in the air, the oxygen content in the water was low, but there were many sulfides, and the first to bear the brunt of it was the predators at the top of the ecological niche, including The Dunn's fish, which disappeared in the dust of history