The day after I find the new diving spot, I returned there. This time, I get all the pearls I couldn't get yesterday and store it on the empty island so I could finish my job faster and explore the sea as much as I want today.
I grabbed a lot of giant seashells, even more than yesterday. Then I put them in that empty island, and go back into the sea.
There aren't many sunken ships, and most of them are just fishing boats. So I can only look for something other than valuables from ships. And most of what I found, are giant seashells with a lot of pearls inside of them.
Although Sam would be mad at me for only finding pearls, it should be okay. We can just tell our clients or business partner that it's difficult to find other treasures underwater.