Tuna - YellowfinYellowfin tuna is caught, seasonally from May to November, in warmer waters associated with the Gulf Stream off the coast of Nova Scotia by the same vessels that longline swordfish. This species of tuna is often marketed as ahi, derived from the Hawaiian word ahi, a name that is also used in Hawaii for the closely related bigeye tuna. Fresh Yellowfin tuna should appear red in color, never brown. Yellowfin tuna is widely used in raw fish dishes,