With a mainland coastline of 1,778 km and island coastlines totaling 4,012 km on the Adriatic, Croatia is suited to the development of marine fishing. However, Croatia lacks adequate fishing vessels as well as the infrastructure to transport and process seafood. The total catch in 2003 was 19,946 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. Aquaculture produced 7,605 tons of fish in 2003.