When it comes to octopus and squid, I believe that everyone subconsciously thinks of this:
Well...... No, it goes like this:
Why does it still feel so unpleasant?
But have you ever thought about it? Who are the ancestors of such delicious food? Yes, the ancestors of such a delicious seafood were the hornstones that dominated the entire Ordovician.
The story of the hornstone also begins with the Cambrian short-stick hornstone. The short-stick horn stone of that year also learned to inflate the shell somehow. This thing, although it was useless at the time, was very interesting, and I didn't expect this cargo to float up. Although we don't know exactly what all the extinct mollusks in history looked like, many scientists believe it already has the tentacles that are now standard for squid.
Then they turned to Berserkers. Unexpectedly, they burst out of infinite evolutionary potential. A sharp beak became the top output equipment at the time, and the funnel that sprayed water allowed them to sprint quickly in a short period of time, and the eyes were also the top match at the time. Therefore, their hunting process should first find the prey with their eyes, rush to the prey with a funnel instantaneously, tie the prey directly with the tentacles, and kill the sharp beak with one blow, which is perfect.
Of course, all of the above is pure nonsense. Because I said before that basically no one knows what the flesh of these extinct mollusks looks like. To tell the truth, there are indeed many fossils of its shell, but there is no fossil with a soft part at all.
Therefore, there are some conjectures that give him a filter eater niche.
After all, the horned stone in the heyday of the Horned Stone Family was at least ten meters long according to the conjectures of the above top predators, and the sea scorpion in the second row was more than one meter long. If you think about such a large body, if you are a predator, it is also a bit of an ecological balance. In addition, the older generation of overlords, Qi shrimp, even had some trilobite fossils that were injured by qi shrimp in the era of rule, and the horn stone had no evidence that he had injured any other creatures. In addition, it is reasonable to say that there are such large hornstones, why is there a very large sea scorpion that is very prosperous? But if Hornstone was a large filter eater, then everything would have been approved, and it would have made up for the lack of many large filter eaters at that time.
Although it is not unfounded to say that the hornstone is a predator, it is not rigorous to directly draw it as a top predator in the documentary.
However, a mass extinction completely shattered the rule of the Horned Stone Family and gave the Sea Scorpion the opportunity to turn over.
However, in the Devonian period, some hornstones simply abandoned their bulky shells and re-emphasized their agility attributes. Evolved into arrow stones. Although this is basically equivalent to the previous white dry, they are as indomitable as their predecessors, pushing the speed of mollusks to the peak. At the same time, it also evolved iq. Undoubtedly, the speed and IQ of mollusks are pushed to the peak. After that, the squid and octopus we know as well completely abandoned the shell.
After the story is told, please give me a thumbs up, collect a treasure, throw a coin, and then point out a note by the way.