Fish farming started countless years ago here locally with the ancient Hawaiians and their fish ponds (http://www.hawaiihistory.org/index.cfm?fuseaction=ig.page&PageID=514). Modern fish farming has also been occurring in Hawaii for quite some time on a couple of the Islands. Bryce recently went out and shot some images for the State of Hawaii for a new campaign they are working on. Standby for more on this topic.
Photographing a Hawaii Fish Farm for the State of Hawaii