A typical 3 oz cooked serving of bluefin tuna contains 25.4 grams of protein (29.9 g per 100 g), which makes it an excellent source of protein. That covers roughly 51% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
About 65% of the calories in bluefin tuna come from protein, which makes it extremely protein-dense - close to the practical ceiling for a whole food. Foods in this band are the ones that let you raise your protein intake without raising your calorie intake much at all.
Among the 121 seafood in the database, bluefin tuna ranks 6th by protein per serving, and 35th out of all 796 foods on the site. Set against ceviche, another seafood entry in the database, a serving carries about 0.9 g less protein (ceviche has 26.3 g per 1 cup).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving above is measured by weight at 85 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #173707 - "Fish, tuna, fresh, bluefin, cooked, dry heat" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Bluefin tuna protein FAQ
How much protein is in bluefin tuna per 100 g?
Bluefin tuna has 29.9 g of protein per 100 g. A typical 3 oz cooked serving (85 g) provides 25.4 g.
Is bluefin tuna a complete protein?
Yes. Bluefin tuna is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
How much of the Daily Value does a serving of bluefin tuna cover?
A 3 oz cooked serving of bluefin tuna contains 25.4 g of protein, about 51% of the 50 g reference Daily Value.
Is bluefin tuna a good source of protein?
Bluefin tuna is an excellent source of protein, and about 65% of its calories come from protein, which makes it extremely protein-dense. Set against ceviche, another seafood entry in the database, a serving carries about 0.9 g less protein (ceviche has 26.3 g per 1 cup).