Fishing Charters & Tours | Book Big Island Tours, Activities & Things to Do with HawaiiActivities.com Embark on a fishing tour off the west coast of the Big Island to catch big game sport fish such as mahi mahi (dolphinfish), ahi (tuna), or marlin! Take a shorter half-day tour or spend the full day fishing on these shared and private charters. Not interested in angling? Look for ride-along options to relax on the boat, taking in the scenic views of Hawaii all around you. Whether you bag the big one or just relax on board, you're bound to have a good time on one of these Big Island fishing tours.