biehlza

Best answer as chosen by Asker / Ratings
I believe one is found in a random bottled message. (beach)
By the left pillar near the quicksand at East River Plains, there should be one.
You receive one from one of your monkey friends in a leaf bundle.
You'll find one from harvesting clams on West Beach.
There should be one near the dirt circle on Crystal Island.
When you go to the top of the Volcano Summit, you should get one.
In the Volcano Jungle, you get one from entering and exiting the Hot Springs.
For performing the ceremonial cliff dive, you get half a piece. The other half is located in a tiger shark.
Hope this helps.