Yes, yellowfin tuna and ahi tuna are the same fish. The name "ahi" is the Hawaiian word for yellowfin tuna. It is often used in Hawaii and other parts of the Pacific to refer to yellowfin tuna, but it can also be used to refer to bigeye tuna. Yellowfin tuna is a large, predatory fish that is found in tropical and subtropical waters around the world. It is a popular fish for sport fishing and commercial fishing. Yellowfin tuna is a good source of protein and omega-3 fatty acids. It is also low in mercury, making it a safe choice for pregnant women and children.