Otoro Saku Blocks from Bluefin Tuna is the cut from the belly with the highest fat content and marbeling. Otoro bluefin tuna has a soft and buttery texture and sweet, intense flavor. Great Alaska Seafood is only carrying Otoro Bluefin for a limited time and this is the lowest price you will find anywhere. If you are slightly interested in trying Otoro Bluefin, you should do it now before we run out.