Review
Sharks have always been the representative of ferocity in our impression, and the scene of the megalodon shark that has been filmed in the United States has filmed the sci-fi thriller movie, and the scene of it opening its blood basin and swallowing a living person can be vividly remembered.
At least in the current ocean, sharks are already one of the top predators; but this position is not innate, and the history of shark overlords must be traced back to 400 million years ago.
It is said that in the ocean 400 million years ago, the shark was still a brother-like existence, suppressed by other marine organisms for nearly 400 million years; it was difficult to wait for the megalodon, and as a result, the ice age came, and this bad luck did not completely exterminate the shark, and it was probably this tenacious vitality that made them sit in the position of hegemony.
The species that are best at evolution
Sharks are considered to be the first species born on the early earth, according to scientists, the world's earliest sharks appeared in the Paleozoic period 400-500 million years ago, which was a relatively common carnivore at that time.
However, from the perspective of fossil structure, there are huge differences in appearance between early sharks and modern sharks, and it can even be said that they are two species.
Ancient sharks looked more like eels in appearance, with rounded mouths, small brains and smooth teeth, unlike the sharp and jagged sharks in modern film and television works.
But as we all know, this non-aggressive appearance is unlikely to survive in prehistoric environments, because the ocean is full of ferocious predators, and in order to make a world in the ocean, sharks must evolve.
If not, the shark race has unlimited possibilities, and the sharks that have initially evolved and occupied a certain position in the ocean are called "slit sharks".
In terms of appearance, the schizoty shark is more than 4-5 times larger than the original shark, they have evolved strong osprey muscles, and the streamlined body shape also gives the schizoty shark the ability to swim in the ocean.
At that time, most of the ocean was a slow swimming creature such as a turtle and a shield fish, and the rift shark was like a fish here, and it was easy to lay a world. So at this time, have sharks become the hegemons of the ocean? Sorry, no!
The real ocean overlord of this period was called "Dun's Fish", a terrifying creature with a body length of 10 meters and the second most bite force in history, and they could eat the rift shark as a snack.
Dunn's Fish
Since you can't beat it, let's continue to evolve, and finally, the second generation of the shark family's "leader" spiny tooth shark was born.
The emergence of the spiny tooth shark is the product of the deterioration of the marine environment, when the Earth was in the Permian period, the geological activity led to the shrinking of the ocean area, in order to obtain living space, the sharks began to migrate to the deep sea, in the process they absorbed the inferiority of the original body size, began to develop in the direction of colossalization.
The spiral tooth shark body length of up to 15 meters, the most frightening thing is its jaw teeth from large to small inside rolled into a saw blade-like circular spiral teeth, in the pursuit of body size on the basis of improved bite ability, this ocean overlord is not a shark?
This is true, but unfortunately the time of the Permian is only 45 million years, and the supremacy of the spiny tooth shark has not yet been secured, and it has been destroyed along with the mass extinction of the species.
Shark: The Overlord is mine! Volcano: What do you say?
Megalodon's post-splendor is gone
In the development history of more than 100 million years, although shark populations have been evolving, there must be more terrifying beings than sharks in marine life in the same period, such as the Mesozoic "Ichthyosaurus", "Dragon King Whale", "Tost Giant Squid" and so on.
Just by listening to this name, you know that they are not easy to mess with, and sharks can only steal life in front of several big brothers. It wasn't until 15 million years ago that sharks truly ushered in the truly decisive species that dominated the oceans, the megalodon.
As we said earlier, the Dunn's fish is the second most powerful and terrifying creature in the history of the ocean, and the first obvious is the megalodon shark! According to scientists, megalodon sharks are about 18 meters long, weigh 50-70 tons, and have a maximum bite force of about 180,000 Newtons.
As far as this bite force is concerned, I believe you that it eats steel plates as candy, not to mention those flesh-and-blood sea creatures. At that time, almost no marine life could resist the bloody mouth of the megalodon shark, including the ribs of whales, which could be easily torn apart, and it was a well-deserved ocean overlord.
However, some people say that the Leviathan whale in the same period can compete with the megalodon shark in terms of combat effectiveness, and the Leviathan whale is about 17 meters long, which is similar to the huge body of the megalodon shark.
More importantly, Leviathan whales are mostly hunted in groups, which is probably the main reason why megalodon sharks can't beat Leviathan whales, people bring a whole family out to hunt, and whoever meets them has to avoid it.
But apart from Leviathan whales, there doesn't seem to be any other creature in the ocean that threatens megalodons. The entire shark family reached its peak under the terrifying power of the megalodon shark, and 99% of the creatures in the ocean had to keep their promises, for fear of being targeted by the hunting megalodon shark.
Sharks are a species that can't be underestimated, and people's evolutionary abilities are simply terrifying.
Megalodons of megalodons
Unfortunately, megalodons also did not rule the oceans for long, because the "Ice Age" has arrived.
The Earth has significantly cooled and cooled many times in its more than 4 billion years of history to form ice ages, such as the Late Cambrian, Permian and Mid-To-Late Cenozoic, sometimes the Time of the Great Ice Age lasts for millions of years, and no organism can survive this cold.
Unfortunately, the megalodon also encountered the Ice Age, and nature did not give it time to continue to dominate, so it disappeared into history along with its rival Leviathan whale.
Shark: Am I not king? How suddenly to heaven
epilogue
Throughout the history of the shark family, the megalodon shark has indeed achieved "a unique branch" and is also known as the "hope of the whole village". After the extinction of the megalodon shark, it has been difficult for sharks to pick up the family beams, including the current great white shark, which still poses a threat to many species in the ocean, such as killer whales, descendants of Leviathan whales.
Perhaps in the future, the shark family can still evolve a terrible existence, but with human intervention, the influence of sharks has been very low.