Sea fishing, especially for tuna and turtle, is excellent. Although fishing is mainly a subsistence occupation, fish is sold in the capital, and bêche-de-mer is exported. The fish catch in 2000 was 400 tons, down from 1,460 tons in 1993. Japanese aid in 1982 provided a commercial fishing vessel for the islands. The Republic of Korea and Taiwan are both licensed to fish within the territorial waters of Tuvalu. In October 1986, Tuvalu, along with several other Pacific island nations, signed an agreement with the United States giving US tuna boats the right to fish its offshore waters. The sale of fishing licenses annually contributes about a$80,000 to the government's revenues.