What Does Swordfish Taste Like? Flavor, Texture, Cooking Methods, and Mercury Guide

by Oleg Nikitenko May 24, 2023

What Does Swordfish Taste Like? Flavor, Texture, Cooking Methods, and Mercury Guide

Swordfish is one of the meatiest, most satisfying fish available — and one of the few fish that consistently appeals to people who don't typically enjoy seafood. Its firm, dense, steak-like texture and mild, slightly sweet flavor make it more approachable than most fish, and its ability to hold up to high heat, bold marinades, and direct grilling makes it one of the most versatile fish for outdoor cooking.

🔗 Swordfish | 🔗 Swordfish Steaks

What Does Swordfish Taste Like?

Swordfish has a mild, slightly sweet, meaty flavor that is most often compared to tuna — both are large, pelagic fish with dense, firm flesh and a flavor that is more "meaty" than "fishy." The comparison is apt: swordfish and tuna occupy similar culinary territory, and people who enjoy one typically enjoy the other.

The flavor profile in detail:

Mildness: Swordfish is mild — not strongly "fishy" in the way that mackerel, sardines, or bluefish are. The flavor is clean and approachable, which makes it a good entry point for people who are new to eating fish.
Sweetness: A subtle sweetness underlies the flavor — more pronounced in fresh, high-quality swordfish; less noticeable in older or lower-quality fish.
Meatiness: The defining quality. Swordfish has a substantial, satisfying flavor that is more reminiscent of meat than of delicate white fish like cod or halibut. This meatiness comes from the fish's high myoglobin content (the same protein that gives red meat its color and flavor).
Brininess: A subtle oceanic finish — present but not dominant. The brininess is less pronounced than in shellfish or oily fish.

How does it compare to other fish?

vs. Tuna: Very similar — both are meaty, mild, and firm. Swordfish is slightly milder and less rich than bluefin tuna; similar to yellowfin (ahi) tuna in flavor intensity.
vs. Halibut: Both are mild and firm, but swordfish is meatier and more assertive; halibut is more delicate and slightly sweeter.
vs. Salmon: Swordfish is milder and less fatty than salmon; the texture is firmer and denser; the flavor is less rich.
vs. Mahi-mahi: Similar mildness; swordfish is firmer and meatier; mahi-mahi is slightly sweeter and more delicate.

Texture: Why Swordfish Cooks Like a Steak

Swordfish has one of the firmest, densest textures of any fish — the flesh is compact and meaty, with a structure that holds together under high heat and rough handling. Unlike flaky white fish (cod, halibut) that fall apart when grilled directly on grates, swordfish holds its shape, develops a proper char, and can be flipped without breaking.

The fat content is moderate (approximately 4–5%) — higher than lean white fish like cod, lower than fatty fish like salmon. The fat is distributed through the muscle, which keeps the flesh moist during cooking and makes swordfish more forgiving than lean fish. It is difficult to dry out swordfish if you are paying attention.

The one texture caveat: Swordfish can become dry and chalky if significantly overcooked. The target internal temperature is 130–135°F for moist, just-cooked swordfish; 145°F+ produces noticeably drier results. Like a steak, swordfish benefits from being pulled off the heat slightly before it reaches the target temperature and resting for 3–5 minutes.

Best Cooking Methods for Swordfish

Grilling — The Best Method

Grilling is the definitive preparation for swordfish — the high heat of the grill produces a beautiful char on the outside while keeping the interior moist, and the smokiness complements the fish's meaty flavor. Swordfish steaks (1–1.5 inches thick) grill exactly like a beef steak.

Method: Pat the swordfish steak completely dry; brush with olive oil; season generously with salt, pepper, and any desired herbs (thyme, rosemary, or a simple lemon-herb marinade). Grill over high heat for 4–5 minutes per side for a 1-inch steak. The exterior should be lightly charred with clear grill marks; the interior should be just opaque and slightly firm to the touch. Rest for 3 minutes before serving.

Marinade option: Combine 3 tbsp olive oil, 2 tbsp lemon juice, 2 cloves minced garlic, 1 tsp dried oregano, salt and pepper. Marinate for 30–60 minutes (not longer — the acid in the lemon juice will begin to denature the protein and change the texture).

Pan-Searing

Pan-searing produces a deeply caramelized crust that is excellent with swordfish. The technique is the same as for a steak: very hot pan, high smoke-point oil, minimal movement.

Method: Pat completely dry; season with salt and pepper. Heat a cast-iron or stainless pan over high heat until smoking; add avocado oil or clarified butter. Sear for 3–4 minutes per side for a 1-inch steak without moving. Add 1 tbsp butter and 2 cloves smashed garlic in the last minute; baste. Rest 3 minutes. Internal temperature: 130–135°F.

Baking

Baking is the most hands-off method and works well for swordfish, particularly when paired with a flavorful sauce or topping that keeps the fish moist.

Method: Preheat oven to 400°F. Place swordfish steaks in a baking dish; brush with olive oil or a compound butter; season. Bake for 12–15 minutes per inch of thickness until just opaque. Do not cover with foil — swordfish has enough fat to stay moist without steaming.

Broiling

Broiling produces results similar to grilling — high heat from above creates a caramelized surface without the smokiness. Position the rack 4–5 inches from the broiler element; broil for 4–5 minutes per side. Watch carefully — broilers vary significantly in intensity.

What Not to Do

Do not poach or steam swordfish — the gentle heat of poaching does not suit the meaty texture and produces a bland, grey result. Do not deep-fry — the dense flesh does not benefit from frying the way that flaky white fish does. Do not marinate for more than 60 minutes in an acid-based marinade — the acid will begin to denature the protein and produce a mushy exterior.

Mercury Content: What You Need to Know

Swordfish is a large, predatory fish that accumulates mercury through the food chain — a process called biomagnification. It is one of the higher-mercury fish available, and consumption should be moderated accordingly.

FDA and EPA guidance on swordfish consumption:

Pregnant women, women who may become pregnant, nursing mothers, and young children: Avoid swordfish entirely. The FDA and EPA specifically list swordfish as one of four fish to avoid during pregnancy (along with shark, king mackerel, and tilefish from the Gulf of Mexico) due to high mercury content.
Adults and older children: Limit to 1 serving per week (approximately 4 oz). Swordfish can be part of a healthy diet for most adults when consumed in moderation.

The mercury concern does not mean swordfish should be avoided entirely by healthy adults — it means it should be consumed in moderation rather than as a daily staple. Rotating swordfish with lower-mercury fish (salmon, cod, halibut, shrimp) is the practical approach for most people.

How to Buy Swordfish

Freshness indicators: Fresh swordfish should be moist and firm, with a clean, mild oceanic smell. The flesh should be ivory to pale pink — not brown or grey. Brown discoloration indicates oxidation and age.
Steak thickness: Buy steaks at least 1 inch thick — thinner steaks overcook before the exterior develops a proper char. 1–1.5 inches is ideal for grilling and pan-searing.
Sustainability: North Atlantic swordfish (US-caught by longline) is well-managed and considered a good sustainability choice by Seafood Watch. Pacific swordfish is also generally well-managed. Look for US-caught swordfish when possible.
Frozen: Properly frozen swordfish is an excellent option — swordfish freezes well due to its dense, firm texture. Thaw overnight in the refrigerator; pat completely dry before cooking.

Flavor Pairings

Swordfish's meaty, mild flavor pairs well with bold accompaniments that would overwhelm more delicate fish:

Citrus: Lemon, orange, and grapefruit — the acidity cuts through the richness and brightens the flavor
Herbs: Thyme, rosemary, oregano, and basil — Mediterranean herbs complement the meaty flavor
Capers and olives: The brininess and acidity of capers and olives are a classic pairing with swordfish in Italian and Sicilian cuisine
Tomatoes: Fresh or roasted tomatoes — the acidity and sweetness complement the meatiness
Garlic butter: A simple garlic butter is one of the best finishing sauces for grilled or pan-seared swordfish
Salsa verde: The herb-acid combination of salsa verde (parsley, capers, anchovies, lemon, olive oil) is an excellent accompaniment

Shop Swordfish

🔗 Swordfish
🔗 Swordfish Steaks — 1–1.5 inch steaks; ideal for grilling and pan-searing

🎥 Watch swordfish cooking tutorials on the Global Seafoods YouTube Channel

FAQs: Swordfish

Q1: What does swordfish taste like compared to tuna?

Very similar — both are large, pelagic fish with dense, firm flesh and a meaty, mild flavor that is more "steak-like" than "fishy." Swordfish is slightly milder and less rich than bluefin tuna; it is most similar in flavor intensity to yellowfin (ahi) tuna. The texture of swordfish is slightly firmer and denser than tuna, and swordfish holds up better to high-heat grilling. People who enjoy tuna steaks typically enjoy swordfish, and vice versa. If you are new to swordfish, think of it as a slightly milder, slightly firmer version of a tuna steak.

Q2: How much mercury is in swordfish and is it safe to eat?

Swordfish is one of the higher-mercury fish available — the FDA and EPA specifically list it as a fish to avoid during pregnancy (along with shark, king mackerel, and Gulf tilefish). For pregnant women, women who may become pregnant, nursing mothers, and young children: avoid swordfish entirely. For healthy adults: limit to 1 serving per week (approximately 4 oz). Swordfish can be part of a healthy diet for most adults when consumed in moderation — the mercury concern does not mean it should be avoided entirely, but it should not be a daily staple. Rotating swordfish with lower-mercury fish (salmon, cod, halibut, shrimp) is the practical approach.

Q3: How do I know when swordfish is cooked through?

The target internal temperature is 130–135°F for moist, just-cooked swordfish — the flesh should be just opaque throughout and firm but not hard to the touch. At 145°F (the FDA's recommended minimum for fish), swordfish is noticeably drier. Like a steak, pull it off the heat slightly before it reaches the target temperature and rest for 3–5 minutes — the internal temperature will continue to rise. Visual cue: the flesh changes from translucent to opaque as it cooks; when the opacity has reached the center, it is done. A thermometer is the most reliable indicator.

Q4: Is swordfish sustainable?

North Atlantic swordfish (US-caught by longline) is well-managed and considered a good sustainability choice by Seafood Watch — the population has recovered significantly from historical overfishing following the implementation of strict catch limits in the late 1990s. Pacific swordfish is also generally well-managed. The main sustainability concern with swordfish is bycatch — longline fishing can incidentally catch sea turtles, sharks, and seabirds. Look for US-caught North Atlantic swordfish when possible, as US fisheries are subject to stricter bycatch regulations than many international fisheries.