This could well be for a Dugong net but is smaller than most i have seen so i think is just a fishing float. Beautifully carved and with a patina you would expect from a float that has been dried over the smoke after use many times. This item is in the category "Antiques\Ethnographic\Pacific Islands & Oceania".
The seller is "archipelagoarts" and is located in this country: AU. This item can be shipped worldwide.