Fish, cusk, raw

Fish cusk, scientifically known as Brosme brosme, is a deep-water whitefish found primarily in the North Atlantic Ocean, off the coasts of New England, Eastern Canada, Iceland, and parts of northern Europe. It belongs to the family Gadidae, the same family as cod and haddock, but differs in having a single long dorsal fin and a distinctive chin barbel that helps it locate bottom-dwelling prey. Cusk thrives in cold, rocky, benthic zones and is often caught in depths ranging from 150 to 450 meters, making it a fish that is less commonly encountered in mainstream markets compared to more popular whitefish like cod or pollock. Despite its relative obscurity, cusk has a long history in coastal fishing communities, especially in Maine, Massachusetts, and Atlantic Canada, where it has been a valuable local seafood resource for generations. Historically, cusk was marketed alongside other whitefish in regional fisheries, and its mild, sweet flavor made it a favorite among local anglers and chefs. Its firm yet tender flesh is often compared to cod or haddock, with a texture that holds up well to baking, pan-searing, or broiling. Worldwide, populations of cusk vary, and while some areas consider it abundant, other regions have seen declines, leading to concerns about sustainable harvesting practices. In parts of Canada, for example, cusk has been classified as endangered due to overfishing and habitat loss, with fisheries management organizations monitoring stock status and implementing conservation measures. Moreover, a dose-response meta-analysis of 40+ cohort studies showed that each additional ~20 g per day of fish intake was associated with ~4% lower risk of coronary heart disease incidence and mortality. These benefits are attributed to multiple nutrients found in fish: marine-derived omega-3 polyunsaturated fatty acids (even in lean fish), selenium, and high-quality protein. (ScienceDirect) Although cusk has lower levels of total omega-3s than oily fish, it still contributes valuable nutrients like protein and selenium that support heart health and metabolic regulation. Potassium in fish is known to help maintain healthy blood pressure, while selenium acts as an antioxidant to mitigate cell damage. There is also evidence that regular fish intake correlates with improved neurodevelopmental outcomes in pregnancy and early childhood, likely due to combined effects of nutrients including omega-3s and B-vitamins. (维基百科) It is important to note that evidence on omega-3 supplements is mixed; large randomized trials have not found consistent benefits for heart disease prevention with supplementation alone, and some studies suggest that routine use may carry risks, underscoring the advantage of consuming whole fish rather than isolated supplements. (JAMA网络) In summary, including fish like cusk in a balanced diet can contribute to improved cardiovascular markers and overall nutritional adequacy, particularly by providing lean protein, essential minerals, and elements that support metabolic health when consumed regularly as part of a varied diet.

While fish cusk is a nutritious food, there are some considerations and potential risks that certain groups should be aware of. As a marine species, cusk — like other wild-caught fish — may accumulate trace levels of environmental contaminants such as mercury. Mercury levels tend to be higher in predatory and long-lived fish, but even whitefish can contain measurable amounts. Regional studies indicate that mercury accumulation in marine fish can vary by location, with higher levels often found in fjords or enclosed coastal systems due to environmental runoff and pollution.

Source: USDA FoodData Central (FDC ID: 171958)