Fish, halibut, raw, with skin (Alaska Native)

Halibut is a large, flatfish belonging to the family Pleuronectidae, native to the cold northern Pacific and Arctic Oceans. The two primary species consumed by humans are the Pacific halibut (Hippoglossus stenolepis) and the Atlantic halibut (Hippoglossus hippoglossus). Traditional foodways of Alaska Native peoples have long included halibut harvested from coastal waters—both for subsistence and cultural celebrations. Alaska Native halibut often comes from wild-caught sources in the Bering Sea, Gulf of Alaska, and surrounding northern waters, where indigenous fishing traditions are deeply rooted in community and seasonal rhythms. Halibut are among the largest flatfish species in the world, with adults capable of exceeding 2 meters in length and 100 kg in weight. What distinguishes halibut from other whitefish is its firm, mild-flavored meat and relatively low fat content compared to oily fish like salmon or mackerel. The fish’s body is asymmetrical—both eyes are located on the top side of the fish—which allows it to lie flat against the seafloor while camouflaged from predators and waiting on prey. Most culinary uses involve fillets or steaks cut perpendicular to the spine, often with the skin left on for additional flavor and texture. The Alaska Native food variant reflected in the USDA database includes halibut with skin, raw. These small nuances matter because skin-on fish can retain slightly different nutrient contents—particularly fat-soluble nutrients and minerals—than skinless cuts. In global markets, halibut is widely available as fresh or frozen fillets, steaks, or even specialty cuts like cheeks, which are prized for their tenderness and concentrated flavor. In indigenous culinary traditions, halibut is more than a source of nutrition; it carries cultural significance. In many coastal communities, halibut harvesting is tied to seasonal festivals, shared meals, and intergenerational teaching about ecological stewardship and marine knowledge. From dried halibut strips to stews and smokehouse preparations, this fish takes on many forms that reflect both sustenance and cultural identity. Beyond Alaska Native communities, halibut is prized in Western cuisine for its versatility. Chefs often highlight its dense, flaky texture that holds up to high-heat cooking methods—like grilling and searing—while still maintaining a moist interior if properly cooked. Its mild flavor profiles make it adaptable with a range of seasonings, from citrus and herbs to richer sauces. Overall, halibut is a globally recognized whitefish known for its nutritional density and subtle oceanic flavor.

Halibut’s nutrient profile reveals why it’s considered an excellent example of lean fish protein. Per 100 g raw serving, this fish provides approximately 20.5 g of high-quality protein, which is essential for muscle building and repair. With just 2.92 g of total fat (of which only 0.73 g is saturated fat), halibut ranks as a low-fat protein source—especially valuable for those monitoring fat intake. Its carbohydrate content is minimal at 1.8 g (all net carbs) and includes no dietary fiber or sugar, making it suitable for low-carb and ketogenic diets. Micronutrients are equally noteworthy. The fish is particularly rich in selenium, offering about 51.1 µg per 100 g, which alone accounts for roughly 90% of the Daily Value (DV). Selenium functions as a powerful antioxidant, supporting immune defense and thyroid hormone regulation. Halibut also supplies a robust B-vitamin complex: niacin (~5.8 mg), vitamin B6 (~0.39 mg), and vitamin B12 (~1.78 µg), critical co-factors in energy metabolism and neurological health. Phosphorus (~244 mg) and potassium (~449 mg) contribute to bone strength and electrolyte balance, while the modest vitamin A content (~47 µg RAE) supports vision and immune function. The amino acid profile of halibut is complete, with substantial levels of essential amino acids like leucine, lysine, and valine—all required for protein synthesis and cellular repair. Compared to higher‑fat fish, halibut’s omega‑3 content is moderate but significant: it contains EPA and DHA totals that contribute to anti‑inflammatory pathways and cardiovascular protection. While less rich in omega‑3s than salmon, even modest amounts support heart health when consumed regularly. In contrast to many plant proteins, the bioavailability of nutrients in fish is high—meaning the body can absorb and utilize these elements efficiently. For example, the iron and zinc found in halibut are more readily absorbed than in many plant sources, providing critical support to metabolic and immune function. Potassium levels rival those of many fruits and vegetables, aiding in blood pressure regulation and nerve function. Calcium and magnesium, though present in smaller amounts, still contribute to skeletal health. Finally, halibut’s nutrient density is supported by its amino acid completeness and micronutrient contributions, classifying it as a high nutrient value per calorie food. This profile suits a wide range of diets aimed at health maintenance, weight management, or targeted nutrient support. Its minimal carbohydrate and fat profile—paired with rich protein and micronutrient density—position halibut as a foundational fish choice in evidence‑based nutrition.

Halibut offers a range of well‑studied health benefits tied to its nutrient composition. A primary advantage stems from its omega‑3 fatty acid content—particularly EPA and DHA—which have been linked with cardiovascular health. Although halibut’s omega‑3 levels are lower than fatty fish like salmon, regular consumption still contributes meaningfully to anti‑inflammatory pathways, triglyceride reduction, and improved vascular function, foundational elements in reducing heart disease risk. Dietary Guidelines consistently recommend at least 8 ounces of seafood per week to maximize heart health benefits within a balanced diet. Selenium—abundant in halibut—plays a vital role as an antioxidant and cofactor for enzymes that protect against oxidative damage. Research shows selenium supports immune function and thyroid hormone metabolism, helping regulate metabolic rate and cellular protection. Adequate selenium intake has been associated with reduced markers of inflammation and improved immune resilience. Selenium also participates in DNA and reproductive health pathways, reflecting its systemic importance. The rich B‑vitamin profile, including B12 and niacin, supports neurological health and energy metabolism. Vitamin B12 is essential for red blood cell formation and nerve integrity, often highlighted in studies as crucial for cognitive maintenance, especially in older adults. Niacin contributes to cholesterol regulation and energy production. Protein quality in halibut is another significant benefit. High‑quality animal proteins provide all essential amino acids necessary for tissue repair, muscle synthesis, and enzyme production. Building and maintaining lean muscle mass is especially important for older adults and physically active individuals. Protein also influences satiety and metabolic rate—key factors in weight management and metabolic health. Potassium and phosphorus further support heart and bone health. Potassium helps maintain normal blood pressure and electrolyte balance, while phosphorus plays a crucial role in bone mineralization and energy transfer mechanisms. Adequate intake of these minerals contributes to skeletal strength and cellular energy processes. Finally, consuming fish as part of a diverse diet is linked in population studies with reduced mortality from cardiovascular disease and improved cognitive outcomes. While not a cure for disease, consistent inclusion of nutrient‑dense fish like halibut aligns with patterns seen in the Mediterranean and other healthy dietary patterns recognized by health authorities for longevity and metabolic health.

Source: USDA FoodData Central (FDC ID: 167638)