Mahimahi is actually Hawaiian for “dolphinfish,” a moniker derived from the fish’s habit of swimming ahead of sailing ships? The iridescent greenish-blue back and gold or silver body make the mahimahi one of the most beautiful fish to swim in the sea. The mahimahi used to be simply a “bonus catch” from purposeful fishing of tuna and swordfish. Nowadays, it is solely pursued by longline fisheries in tropical and subtropical waters around the world. Its average market weight is five pounds, though it can reach up to 50 pounds.