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Speaking of the Straight-shelled Nautilus, it had a long history on Blue Star.
During its heyday, its strongest competitor was the eurypterid.
The two had engaged in an evolutionary race during the middle Cambrian period.
Until the end of the Cambrian period, the Straight-shelled Nautilus had held the upper hand.
After surviving the late Ordovician extinction event,
the Straight-shelled Nautilus was severely weakened and ultimately lost to the eurypterid.
Yet it still retained an extremely high status in the ocean.
By the Devonian period, with the appearance of Dunkleosteus, the eurypterids in the sea were forced onto land.
Since the Straight-shelled Nautilus could not go ashore, it was suppressed by Dunkleosteus and completely lost its position as ruler of the seas.
Then came the appearance of Helicoprion during the Permian period.
It left the Straight-shelled Nautilus family on the brink of extinction.
By the Triassic period, ichthyosaurs ruled the seas, and the Straight-shelled Nautilus went completely extinct.
Ye Yuan could hardly believe his eyes when he discovered a Straight-shelled Nautilus shell here today.
He reached out and touched the shell before him.
He discovered that the Straight-shelled Nautilus shell was not as fragile as he had imagined. It felt almost like jade.
Ye Yuan was instantly overjoyed.
After all, discovering even one Straight-shelled Nautilus was already incredibly lucky.
Not to mention that the one he had found was a shell that had already turned to jade.
Something like this simply could not be described in terms of probability.
It was like the Chinese national football team qualifying for the World Cup and then winning it outright.
Even if someone told others those odds, no one would believe it.
For a shell to turn to jade was both an astonishing coincidence and an