Fish abound in Costa Rican waters, particularly in the Pacific Ocean, where 89% of the annual harvest is caught. Tuna, herring, and shrimp are the most valuable commercial fish; they are caught, processed, and shipped abroad by US firms. A small native fishing industry contributes to the domestic food supply and exports shark, mollusks, and live lobsters. Pearl fishing, once an important industry on the Pacific coast, has declined. In 2000, the total volume of fish landed was an estimated 27,950 tons.