What Is Surmai Fish? Scientific Name, Cuts, Taste and How to Cook It

Surmai is one of the names you are very likely to hear when buying seafood in Karachi. It is commonly sold as a substantial, firm-fleshed fish and appears in everything from simple masala fry to grilled portions and curries.

But there is an important detail that often gets lost in the market: Surmai is a market name, not a guarantee of one particular species.

In Pakistan, the name is used for seerfish and Spanish-mackerel-type fish. A Pakistani seafood source identifies Surmai as Scomberomorus guttatus, while wider seerfish records include several Scomberomorus species. For that reason, the most responsible way to describe Surmai is as a market category whose exact species should be confirmed for a particular fish.

That distinction may sound technical, but it matters when you are trying to understand what you are actually buying.

What fish is Surmai?

In Karachi and elsewhere in Pakistan, Surmai generally refers to fish in the seerfish group, particularly members of the genus Scomberomorus.

One documented Pakistani identification is:

Scientific name: Scomberomorus guttatus Common group: Seerfish / Spanish mackerel-type fish Market name: Surmai

The problem is that the word “Surmai” is not used with the same taxonomic precision as a scientific species name. Several seerfish species occur across the region, and seafood markets often operate around familiar commercial names rather than formal biological classification.

So when someone says “Surmai,” the useful question is not simply “What is the scientific name?” It is:

Which species is being sold under the name Surmai?

For a properly documented product, the seller should be able to identify the species more precisely.

What does Surmai look like?

Seerfish are built for fast swimming. They have elongated, streamlined bodies, a pointed head and a powerful tail.

The exact appearance varies by species, but Surmai sold in the Karachi market is generally recognizable as a long-bodied fish rather than a deep, round-bodied fish such as pomfret.

Fresh whole fish should have firm flesh, a clean appearance and a mild smell. Those qualities tell you more about handling and condition than the market name alone.

A useful point when buying seafood is that appearance can help you identify a fish, but it cannot by itself prove that the fish is fresh or safe to eat.

What does Surmai taste like?

Surmai is generally chosen for its firm, substantial flesh rather than a delicate texture.

That makes it useful for preparations where the fish needs to survive handling, high heat or a sauce without immediately falling apart.

How strongly a fish tastes, however, should not be confused with how “fishy” it smells.

A properly handled fish should generally have a fresh, mild smell. A strong sour, rancid or ammonia-like odour is a warning sign of deterioration, not simply proof that a particular species naturally has a stronger flavour.

The final flavour also depends on preparation. A heavily spiced masala fry will obviously taste very different from a lightly seasoned grilled steak of the same fish.

Is Surmai oily or lean?

Seerfish are generally considered more substantial and relatively oily than very lean white-fleshed fish.

That helps explain why Surmai works particularly well with high-heat cooking such as grilling and frying. The fish has enough structure to handle the cooking process without behaving like a very delicate fillet.

The exact fat content, however, varies by species, size, season and other biological factors. We would therefore avoid giving a single nutrition number for “Surmai” without identifying the actual species.

Does Surmai have bones?

Yes.

Surmai is not naturally a boneless fish.

The number and inconvenience of bones you encounter depends heavily on how the fish has been cut. A thick steak, a sliced portion and a properly trimmed fillet do not present the same eating experience.

This is one reason the phrase “boneless Surmai” should be treated as a preparation claim rather than a property of the species itself.

A fish can be filleted and still retain small pin bones unless those have specifically been removed.

So when ordering, it is better to ask:

Do I want whole fish, slices, steaks or a boneless fillet?

That question tells the seafood seller much more about what you actually need.

Surmai steaks vs slices

This distinction is particularly useful in Karachi.

A steak is a crosswise section cut through the fish, usually retaining part of the backbone. It is a sturdy cut and works especially well for grilling, pan cooking and other preparations where a substantial portion is useful.

“Sliced Surmai” is a common retail description, but the exact cut can vary between sellers. It is therefore worth asking how thick the portions will be and whether the central bone remains.

For a curry, thicker pieces are often easier to handle because they are less likely to break apart during cooking.

For frying, thinner pieces can give you more surface area for seasoning and a quicker cook.

How should you cook Surmai?

There is no single “correct” way to cook Surmai. The best preparation depends on the cut and the dish.

Surmai for frying

Surmai can work very well for frying because its flesh is firm enough to handle turning and pan contact.

For a masala fry, thinner slices give you a generous seasoned surface and cook relatively quickly.

Thicker cuts need more care. If the heat is too high, the outside can brown heavily before the centre is cooked.

For the cleanest result:

The important variable is not a universal number of minutes. Thickness, starting temperature and heat level all change the cooking time.

Surmai for grilling

This is one of Surmai’s natural strengths.

A thick steak or substantial portion is much easier to grill than a very thin, delicate fillet because it is less likely to break when turned.

Before grilling, dry the surface and season or marinate according to the style you want.

For a simple Karachi-style approach, a spice-based marinade can give the surface strong colour and flavour while allowing the fish itself to remain noticeable.

Watch the fish rather than blindly following a clock. The thinner the portion, the faster it will cook.

Surmai for BBQ

Surmai is also well suited to charcoal or BBQ-style cooking.

The key distinction is that BBQ is not one single technique. A fish cooked directly over strong charcoal heat is experiencing something different from a thick portion cooked more gently away from the hottest part of the grill.

For charcoal cooking, control the distance from the heat and avoid leaving a heavily marinated surface over intense flames for too long.

A good thick portion should develop browning on the outside while remaining properly cooked inside.

Surmai for curry

Firm fish such as Surmai can work particularly well in curry because the flesh can retain its shape better than very delicate fish.

The main mistake is treating the fish like an ingredient that can simmer indefinitely.

Add the fish when the sauce is ready and handle the pieces gently. Excessive stirring can break even firm fish.

Thicker cuts are generally more forgiving for curry than thin pieces.

Surmai for baking

Baking is another good option, particularly for larger portions.

The most important factor here is thickness.

A thin fillet and a thick bone-in steak should not be given the same cooking time simply because they are both called Surmai.

Consider:

Cook based on doneness rather than memorizing one universal time.

What temperature should Surmai reach?

For a straightforward food-safety reference, the FDA recommends cooking seafood to an internal temperature of 145°F / 63°C.

A food thermometer is the most reliable way to check.

When a thermometer is not available, cooked fish generally becomes opaque and separates easily with a fork. That visual test is useful, but a thermometer gives you a more objective measure.

The same principle applies to Surmai as to other seafood: the clock is a guide, but internal doneness is what matters.

How much Surmai should I buy?

Do not automatically translate a whole-fish weight into the amount of food you will actually eat.

A whole fish includes the head, bones, skin and trimming. A boneless fillet has a much higher usable yield.

That means:

1 kg whole Surmai ≠ 1 kg edible fish

The correct amount depends on the cut you buy and how many people you are serving.

For meal planning, think in terms of the edible portion, then adjust for the preparation you are purchasing.

How do I know if Surmai is fresh?

The same basic freshness checks used for other fresh fish apply here.

For a whole fish, look for:

For a cut portion, look for firm flesh, clean surfaces and no strong sour, rancid or ammonia-like smell.

But remember an important distinction:

Freshness indicators are not a guarantee of food safety.

Some harmful microorganisms and toxins do not necessarily announce themselves through smell or appearance. Good seafood handling depends on maintaining proper time and temperature controls as well.

How should I store Surmai at home?

Raw fish should be kept properly chilled after purchase.

A refrigerator should be at or below 4.4°C / 40°F. USDA and FDA guidance recommends using refrigerated raw seafood within roughly 1 to 2 days, or freezing it if it will not be cooked within that window.

At home, keep the fish in a clean container or tray that can contain any liquid, and keep it away from ready-to-eat foods.

If you are not planning to cook the Surmai promptly, freezing is the better option than allowing it to sit refrigerated for several additional days.

Can Surmai be frozen?

Yes.

Freezing is a normal and useful way to preserve seafood. It does not automatically make seafood poor quality.

What matters is how it was handled before freezing, how well it was packaged and how long it remains frozen.

Over time, frozen seafood can lose quality through changes in texture, moisture and flavour even though continuously frozen food can remain safe for much longer.

For the best eating quality, minimise air exposure and package the fish securely before freezing.

Should I buy Surmai whole, sliced or as fillets?

Think about the dish first.

Buy whole Surmai when you want a larger presentation, BBQ, roasting or another whole-fish preparation.

Buy steaks or thick slices when you want substantial portions for grilling, pan cooking or curry.

Buy fillets when convenience, portion control or easy cooking matters most.

Buy boneless fillets when you specifically want the bone removal work done for you, but confirm what the seller means by “boneless.”

There is no universally superior cut. The right cut is the one that matches how you intend to cook and eat the fish.

So, what should you know when buying Surmai?

The most important thing is surprisingly simple:

Do not treat the name Surmai as the whole story.

In Karachi, Surmai is a familiar market name for seerfish-type fish, but the exact scientific species can vary. A careful seafood seller should be able to tell you what species they are selling when that information has been verified.

From a cooking perspective, Surmai is valued for its firm flesh and versatility. Steaks and thicker slices are particularly useful for grilling, BBQ and curry, while thinner portions can work well for frying.

And when choosing between cuts, remember that the preparation often matters just as much as the fish itself.

A good seafood purchase is not simply:

“I want Surmai.”

It is:

“I want Surmai, cut this way, for this dish.”

That is how you get the result you actually want from the fish.