Pearls will not be obtained, you can look at the experience of Xiaobian.
First come to the map of Santopani, come to the beach of the resort.
Running back and forth around the river on the beach, you can see the shells.
The shells, as shown here, are very beautiful and radiant.
Shell page, click Pick this item.
There will be pearls inside the shell, click to pick all.
Finally, the pearl can be successfully picked up.