These are hidden caches of Berries (money) that only Nami can see. To be able to pick up these items you must be switched to Nami.
Onece you find and collect 25 of these items, you will unlock the "Treasure Sensor" achievement / trophy.
Oh, my money!
130,000 Berries (Nami)
27,000 Berries (Nami)
27,000 Berries (Nami)
27,000 Berries (Nami)
39,000 Berries (Nami)
39,000 Berries (Nami)
39,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
45,000 Berries (Nami)
60,000 Berries (Nami)
75,000 Berries (Nami)
90,000 Berries (Nami)
200,000 Berries (Nami)
200,000 Berries (Nami)
200,000 Berries (Nami)
60,000 Berries (Nami)
60,000 Berries (Nami)
60,000 Berries (Nami)
60,000 Berries (Nami)
60,000 Berries (Nami)
60,000 Berries (Nami)
60,000 Berries (Nami)
220,000 Berries (Nami)
220,000 Berries (Nami)
230,000 Berries (Nami)
235,000 Berries (Nami)
240,000 Berries (Nami)
240,000 Berries (Nami)
240,000 Berries (Nami)
250,000 Berries (Nami)
725,000 Berries (Nami)
735,000 Berries (Nami)
740,000 Berries (Nami)
750,000 Berries (Nami)
150,000 Berries (Nami)
160,000 Berries (Nami)
200,000 Berries (Nami)
600,000 Berries (Nami)