Swordfish

Swordfish: Nutrition, History and Cooking Guide

Swordfish (Xiphias gladius) is a large, highly migratory oceanic predator found in tropical and temperate seas worldwide, immediately recognisable by its distinctive elongated bill used to slash through schools of prey fish. It is one of the fastest fish in the ocean and one of the most prized by both sport fishermen and commercial fisheries across the Atlantic, Pacific, Mediterranean, and Indian Ocean. In Sicily, swordfish has been a centrepiece of coastal cuisine for centuries — the traditional mattanza (communal tuna and swordfish hunt) was once a defining cultural event of Sicilian maritime life. In the Mediterranean, grilled swordfish with olive oil, lemon, and oregano is one of the most classic summer preparations. In the United States, the "swordfish crisis" of the 1990s — when populations fell dramatically from overfishing — led to a successful campaign to reduce consumption and improve management, and North Atlantic swordfish stocks are now largely recovered under international management agreements.

Nutritional Value of Swordfish

Swordfish provides 144 kcal and 19.7 g of protein per 100 g, with 6.7 g of fat — moderate fat with a firm, meaty texture. It provides omega-3 fatty acids, niacin, B12, selenium, and phosphorus in good quantities. Swordfish accumulates methylmercury due to its large size and position at the top of the marine food chain — a consideration for pregnant women, nursing mothers, and young children who are advised to limit consumption.

Health Benefits of Swordfish

Swordfish provides good protein, omega-3, and selenium at moderate caloric cost. The firm, dense flesh is satisfying and nutrient-rich. For healthy adults without pregnancy or young children concerns, swordfish is a nutritionally valuable fish best enjoyed in moderation — no more than once a week — as part of a varied diet that includes lower-mercury fish more frequently.

How to Select and Store Swordfish

Swordfish is sold as steaks, typically 2–3 cm thick. Look for pale pink to white flesh — not brown or grey — and a clean smell. Refrigerate for up to two days; freeze for up to three months.

How to Cook Swordfish

Swordfish steaks cook like a dense steak and are ideally cooked on a very hot grill or griddle pan for three to four minutes per side for medium — just opaque throughout with a slight give when pressed. Do not cook beyond medium as the flesh becomes dry and chalky. Marinate in olive oil, lemon, garlic, and herbs before grilling. Swordfish works well in skewers, in Sicilian-style preparations with capers and tomatoes, and in Japanese preparations as an alternative to tuna.