5. Yellowfin tuna:
Also known as light tuna, it is also available in cans and pouches. This variety has a slightly pronounced flavor than the white albacore tuna. You can eat no more than one serving per week.
6. Ahi tuna:
It is also known as Bigeye, and is available as a steak or sashimi. It is not canned and contains higher levels of mercury. You can only eat up to 6oz a week.