A typical 3 oz cooked serving of halibut contains 19.1 grams of protein (22.5 g per 100 g), which makes it a very good source of protein. That covers roughly 38% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
About 81% of the calories in halibut 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, halibut ranks 71st by protein per serving, and 181st out of all 796 foods on the site. Set against canned pink salmon, another seafood entry in the database, a serving carries about 0.5 g less protein (canned pink salmon has 19.6 g per 3 oz drained).
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 #174201 - "Fish, halibut, Atlantic and Pacific, 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
Halibut protein FAQ
How much protein is in halibut per 100 g?
Halibut has 22.5 g of protein per 100 g. A typical 3 oz cooked serving (85 g) provides 19.1 g.
Is halibut a complete protein?
Yes. Halibut 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 halibut cover?
A 3 oz cooked serving of halibut contains 19.1 g of protein, about 38% of the 50 g reference Daily Value.
Is halibut a good source of protein?
Halibut is a very good source of protein, and about 81% of its calories come from protein, which makes it extremely protein-dense. Set against canned pink salmon, another seafood entry in the database, a serving carries about 0.5 g less protein (canned pink salmon has 19.6 g per 3 oz drained).