With a mainland coastline of 1,778 km (1,105 mi) and island coastlines totaling 4,012 km (2,493 mi) on the Adriatic, Croatia is suited to the development of marine fishing. The total catch in 2000 was 21,388 tons, of which 98% was from marine waters. Sardine is the principal saltwater species caught; carp is the most common freshwater species. Croatia's annual catch has declined steadily due to overfishing for a variety of species. However, fish farming has resulted in an overproduction of freshwater species and a decline in prices.