Overview

Cusk, also known as tusk, is a marine fish in the ling family Lotidae and the only species in the genus Brosme. It is a cold-water, bottom-dwelling fish found in the North Atlantic, with firm, white, mild-flavored flesh similar to cod or haddock. Its most distinctive visual feature is a single continuous dorsal fin, unlike other cod-like fish which have two or three.

Origin and history

Cusk is native to the North Atlantic, ranging from the coast of New England and Canada across to Greenland, Iceland, and northern Europe [1]. It has been fished commercially for centuries in Scandinavian and British waters, where it is often sold as “torsk” or “tusk.” In North America, it is a less common catch but appears in markets in the northeastern United States and Atlantic Canada. Overfishing has led to population declines in some areas, and the species is considered vulnerable in parts of its range [1].

Varieties and aliases

  • Tusk (common name in the UK and Ireland)
  • Torsk (Scandinavian name)
  • Brismak, brosmius, moonfish (regional or historical names)
  • Brosme brosme (scientific name, sole member of its genus)

Culinary uses

Cusk is prepared similarly to cod or haddock. Its firm, white flesh holds up well to baking, broiling, poaching, and frying. In Scandinavian cuisine, it is often boiled or steamed and served with melted butter, potatoes, and dill. In New England, it may be used in chowders or fish cakes. The flesh is lean and mild, making it suitable for preparations that rely on butter, cream, or broth for moisture and flavor.

Cross-cuisine context

Cusk has no direct analogue in Mexican cuisine, as it is a cold-water North Atlantic species not found in Mexican waters. Its closest functional analogue in the Yum corpus is bacalao (dried salted cod), which is used in Mexican dishes like bacalao a la vizcaína. However, cusk is almost always sold fresh or frozen, not dried and salted. In other LA-relevant cuisines, cusk could substitute for cod or haddock in Japanese simmered dishes (nitsuke) or in Korean fish stews (maeuntang), though it is not a traditional ingredient in either.

Notes for cooks

  • Cusk fillets are thicker near the head and taper toward the tail; adjust cooking times accordingly to avoid overcooking the thin end.
  • The flesh is lean and can dry out quickly. Poaching in milk or broth, or baking with a butter or cream sauce, helps retain moisture.
  • Cusk is sometimes sold under the name “torsk” in Scandinavian markets; check the label or ask the fishmonger to confirm the species.