If you're one of those people who linger in the canned goods aisle, wondering whether to buy tuna or bonito, you're not alone. Although at first glance they may look almost identical, We're not talking about exactly the same fish And, if you like to eat well, it's worth knowing the nuances.
Sometimes you read "light tuna" on the label, other times "northern bonito" or "white tuna," and of course, it's normal for questions to arise. Is tuna a cheaper version of bonito? Do they taste the same? Do they offer the same nutritional value? Throughout this article we will calmly break down all the differences between tuna and bonito, from biology to taste on the plate.
Are tuna and bonito the same thing?
Although they are often lumped together, Tuna and bonito belong to different species within the tuna family., a group of oily fish highly prized in gastronomy. They share a family, but not a “surname”.
When we talk about bonito in Spain, we almost always mean the albacore tuna (Thunnus alalunga), also known as white tunaIn contrast, much of the canned tuna we find in the supermarket comes from light tuna (Thunnus albacares) or, in some cases, bigeye tuna.
At the market level there is considerable confusion because, depending on the geographical area, The commercial names of tuna changeIn some places, species that are not technically of the genus Thunnus are called bonito, such as the southern bonito (Sarda sarda), which is also marketed as tuna.
Beyond the names, The main differences between tuna and bonito are noticeable in the size, color and texture of the meat, the flavor, the fat content, and the fishing area and method. And, of course, in the price we pay for each can or fresh piece.
Northern bonito: what it is and how to recognize it
The so-called northern bonito is a species of tuna with the scientific name Thunnus alalungaIt is called albacore tuna because of the pale tone of its flesh, much lighter than that of other tunas, and in Basque it is known as hegaluze, in reference to its long fins.
Its body is elongated and fusiform, very well adapted to life on the high seas. The back has a dark metallic blue color, almost black, while the flanks and belly are clearly silver, separated by a bluish and iridescent band that makes it very recognizable.
One of its defining characteristics is the length of its pectoral fins. These fins can reach up to 30 centimeters in length. And in many specimens, they extend beyond the anal fin. Hence the "alalunga" in its scientific name, which literally means "long wing".
In terms of size, the northern bonito is not the largest of the tuna species. It is usually found between 30 centimeters and one meter in length.with usual weights of 8 to 15 kilos, although it can exceed that figure in large specimens.
At the market level, northern bonito is one of the most valued and rarest tuna speciesIts loins and its belly (the fattiest part of the belly) are considered high-end products, both fresh and preserved.
Light tuna and other common tunas
When we talk about canned tuna "plain", it is usually yellowfin tuna (Thunnus albacares), also called yellowfin, albacore or albacore in various countries. He is the undisputed king of the canned tuna industry.
The light tuna has a more robust and less streamlined body than the northern bonito. Its pectoral fins are considerably shorter, proportionate to the rest of the body, and stands out for a second dorsal fin and ventral fins of intense yellow tone, a very typical feature of the yellowfin.
In terms of size, it's in a different league. Specimens of yellowfin tuna can easily exceed 50 kilos and, under optimal conditions, reach up to 100 or even 200 kilos.This makes it the most caught tuna worldwide and the most used for canning.
In recent years, and following changes in Spanish legislation, Bigeye tuna can also be marketed as light tuna, a somewhat cheaper and lower quality species, which contributes to further reducing the final price of the product.
Besides the light tuna, it is worth mentioning the bluefin tuna (Thunnus thynnus)Highly prized in haute cuisine for sushi and sashimi, with a deep red, fatty meat and a delicate flavor, and the common or southern bonito (Sarda sarda), smaller in size, with dark stripes on the back, which is also used in preserves and Mediterranean dishes.
Physical differences between tuna and bonito
If you had the whole pieces in front of you, you would see that The physical differences between yellowfin tuna and albacore tuna are quite clear.You don't need to be a marine biologist to appreciate them.
On the one hand, the northern bonito has a finer, longer and more elegant body. Its long, thin pectoral fins give it a distinctive appearance. and they are key to distinguishing it. The metallic blue color of the back contrasts with the white belly.
Light tuna, on the other hand, shows a more voluminous and compact bodyIts pectoral fins are short, and the dorsal and anal fins are relatively long compared to other tuna, but not as long as the pectoral fins of the bonito. The yellowish tones on the dorsal and ventral fins are very distinctive.
If we look at the tail, tuna in general have a very powerful caudal finIts crescent shape allows it to reach high speeds, around 65-70 km/h. This is especially evident in large tuna such as bluefin or yellowfin tuna.
Another significant visual difference is the overall size: The albacore tuna has a clearly smaller average size than the skipjack tuna.While a typical bonito weighs around 15 kilos, a common light tuna can easily reach 50 kilos or more.
Color, texture and flavor of the meat
The first clue that the consumer usually notices is on the plate: The color of the meat of the northern bonito is very light, sometimes almost white.especially when it is presented in high-quality canned form. Hence, it is known as albacore tuna.
Instead, the The flesh of light tuna has a pinkish to reddish hueIt's darker than albacore tuna, though not as intense as the deep red of bluefin tuna. If you compare a can of light tuna with a can of albacore, the contrast is obvious.
In terms of texture, northern bonito is characterized by a very tender, juicy meat that easily falls apart into flakesFrom a culinary perspective, it is perceived as finer and more delicate, somewhat less fatty on the palate; moreover, it is excellent in pasta recipes such as nero di sepia noodles with tuna pesto.
Light tuna meat is firmer, more compact and slightly rougherThis consistency makes it ideal for certain preparations, especially raw (sushi, sashimi, tartares) or in dishes where the fish is expected to maintain its shape.
There are also clear differences in taste: Northern bonito offers a more delicate, mild, and elegant taste.While light tuna has a more intense and pronounced flavor, accompanied by a fattier sensation in the mouth, which many people love.
Nutritional value and health benefits
Both yellowfin tuna and albacore tuna are oily fish rich in high-quality protein and omega-3 fatty acidsFrom a nutritional point of view, both are very interesting in a balanced diet.
The northern bonito provides around 140 kilocalories per 100 gramswith an approximate fat content of 6%. This fat is mostly polyunsaturated, with the presence of omega-3 fatty acids that help to reduce LDL or “bad” cholesterol, improve blood flow and reduce the risk of blood clots.
Light tuna usually has a slightly higher fat content, which means slightly more calories and a more oily mouthfeelIn return, it also provides a good dose of omega-3, which contributes to cardiovascular health and the proper functioning of the nervous system.
Both tunas are prominent sources of fat-soluble vitamins such as A and DThey are important for vision, skin, the immune system, and bone health. They are also rich in B vitamins, especially B3 (niacin), B12, and folic acid, which are key for energy metabolism and red blood cell formation.
In the minerals section, the content of phosphorus, magnesium, and iodinePhosphorus is essential for bones and teeth, magnesium is involved in muscle and nerve function, and iodine is essential for the proper functioning of the thyroid gland.
10 recipes from our Thermorecipes recipe book
Tuna with onion
Delicious recipe for tuna with onion. Very easy to prepare and it is perfect for those summer days when you want to eat lighter and faster food.
Delicious recipe of tuna or bonito cooked slowly with onion and white wine, perfect to serve hot or warm with bread or a light side dish.
Tuna pie
We show you how to make a simple and delicious tuna patty. Ideal for preparing a birthday or an informal dinner.
Classic empanada with homemade dough and juicy filling of tuna, onion, peppers and tomato, ideal for gatherings or as an appetizer.
Bonito fish with tomato
Do you have a busy day tomorrow and want to get your food done? We recommend this bonito with tomato. Easy and simple.
Simple recipe for bonito with a mild sofrito of onion, garlic, pepper and tomato, perfect to accompany with rice or potatoes.
Dried tomato and tuna pâté
Simple appetizer, very tasty, that we can serve with toasted bread or with crackers. It is prepared in a few minutes.
Easy and tasty appetizer: creamy tuna pâté with sun-dried tomatoes, ideal for spreading on toast or crackers.
Tuna mousse
Tuna mousse recipe for Thermomix, a delicious dish that you can use to spread or combine in a salad or salad.
Light tuna mousse perfect for toast or as an elegant appetizer, with a smooth texture and delicate flavor.
Scrambled eggs with zucchini and tuna
Scrambled eggs with zucchini and tuna
This zucchini and tuna scramble is as simple as it is juicy. A simple recipe that you will have ready in 15 minutes with your Thermomix.
Quick and nutritious dish of zucchini and tuna mixed with eggs for a juicy scramble ideal for dinners.
Tuna cake
Who doesn't know this classic tuna cake recipe? Perfect for family gatherings or informal dinners, quick and suitable for preparing in the microwave.
Creamy pie made with tuna, cream and fried tomato, a simple recipe perfect for family meals or snacks.
Quick and delicious tuna empanada
Quick and delicious tuna empanada
Do you want to make a quick and delicious tuna empanada? We propose the best way to do it in a simple way.
A simpler and quicker version of tuna empanada with puff pastry and vegetables, perfect for when you want something delicious without complications.
Bonito in canned oil
We prepare our own canned tuna in oil in just 15 minutes. A simple, economical and very practical recipe.
Homemade recipe for preparing bonito in olive oil, ideal for use in salads or sandwiches.
Rice with tuna
We show you how to make a delicious and balanced tuna rice for when you have little time and want to prepare a complete dish.
Easy and quick tuna rice dish with vegetables and a classic touch that both adults and children love.
Fishing areas and migrations
The northern bonito has a very curious life cycle. It is born in the Sargasso Sea, in the middle of the Atlantic, and when it reaches adulthood it groups together in schools of similar size individuals to undertake long migrations.
After their first year, They migrate to areas such as Madeira, the Azores and the Canary Islandswhere they spend the winter. In their second year, when they measure around half a meter, they make a second migration towards the Bay of Biscay and the Cantabrian Sea, looking for surface waters rich in food.
They remain in these waters during the summer, which explains why The northern bonito fishing campaign is concentrated in the summer months.In autumn, they begin their return to their areas of origin, repeating this migratory cycle for several years.
From the third year of life, when they reach sexual maturity, They become more solitary and move towards deeper waterschanging their routes and behavior, which makes selective capture somewhat more complicated.
Light tuna and bluefin tuna, for their part, are mainly distributed through tropical and subtropical waters of the Atlantic, Pacific and Indian OceansBluefin tuna usually spend the winter in the North Atlantic and move to the Mediterranean in summer to reproduce, while skipjack tuna make long migrations in search of food and suitable temperatures.
Fishing methods and sustainability
One important difference between albacore tuna and many commercial tunas is the the way in which they are capturedIn the case of Cantabrian albacore tuna, traditional fishing has great economic and cultural importance.
The northern albacore campaign is underway in the summer months in the Bay of BiscayThere, the fleets of the Cantabrian coast use selective fishing methods such as live bait and rod fishing, capturing specimens one by one and significantly reducing accidental catches.
This form of fishing, deeply rooted among the arrantzales (Basque and Cantabrian fishermen), It is considered a more sustainable and environmentally friendly technique for the marine environment.In addition to guaranteeing excellent freshness and quality of the fish, which arrives quickly at port.
In the case of bluefin tuna in areas such as the coast of Cádiz, The almadraba is the traditional fishing methodIt is a fixed network of nets through which tuna pass during their migrations. When they enter the labyrinth, the famous "lifting" takes place, gradually raising the nets.
During this process, The fishermen select the largest specimens, while the smaller ones can be released.This adds a sustainability component. However, there are also industrial tuna fishing methods (such as purse seine with a mother ship) that, while productive, generate more environmental concern.
Availability, presentation and preservation
One practical difference that the consumer notices is the season and availability of each speciesLight tuna, caught in large ocean areas and by industrial fleets, is available practically all year round in canned form.
The northern bonito, on the other hand, It has a more limited season, running from late spring to autumnIt is during these months that it can be found fresh more easily in fishmongers and markets, especially in northern Spain.
Because it is a highly perishable fish, Fresh bonito should always be kept well refrigerated and surrounded by ice. from the moment of capture. Once purchased, it is best to keep it clean in the refrigerator and consume it within 24-48 hours.
If you're not going to eat it so quickly, it's a fish that It tolerates freezing at -18°C quite well.It's best to vacuum-seal it or wrap it in cling film to prevent it from drying out or absorbing odors from other foods. In good condition, it can be kept for about three months without losing much quality.
The most common way to find bonito del norte in most homes is in preserved in olive oil, sunflower oil or naturalOnly Thunnus alalunga can be legally sold as "Bonito del Norte" or "Albacore Tuna." High-end preserves, often in glass jars, are hand-filled and command higher prices; many of these preserves are perfect for preparing eggs au gratin with tuna and aurora sauce.
On the palate: differences in cooking
If we focus on what matters to many, which is How do tuna and bonito behave in the kitchen?We also find interesting nuances. Northern bonito, with its smooth texture and delicate flavor, is considered a more refined product.
Canned bonito del norte offers loins that separate into large, juicy flakesIdeal for warm salads, kebabs, toast, or simply enjoyed with bread and a good olive oil. Their canned tuna belly is especially prized for its richness; it also works very well for scrambled eggs with zucchini and tuna.
Fresh, northern bonito shines in classic recipes such as northern marmitakoGrilled bonito, pickled bonito, or bonito with onions are dishes deeply rooted in the cuisine of both northern and southern Spain. Its flesh lends itself to short cooking times to retain all its juiciness.
Light tuna, for its part, It is the star of everyday canned goodsIt's versatile, well-priced, and goes well in salads, sandwiches, piesfillings, pizzas and much more.
In terms of texture, canned light tuna tends to to be somewhat firmer and less easily laminated into thin flakes than albacore tuna. Its more intense and fatty flavor is very popular in preparations where the fish is meant to stand out from the other ingredients.
Other tuna and bonito on the market
Besides the main stars, albacore tuna and light tuna, other species appear on the shelves and in fish markets Other species are also sold as tuna or with the word "bonito" on the label., which increases the confusion.
El bonito del sur (Sarda sarda) It is a clear example. It does not belong to the genus Thunnus, but it is marketed as tuna. It is an elongated fish, of a more modest size (it can weigh around 5 kilos), metallic blue in color with distinctive black stripes on its back.
It is also known as saw, bonito or sierra Depending on the area. Its meat is fatty and tasty, more economical than that of the northern bonito, and is used both fresh and in preserves and traditional dishes of Mediterranean and Atlantic areas.
Next to him, the common bonito (another name used for Sarda sarda) and other small tuna complete the offering, each with particularities in size, fat content, flavor and texture, but all within the large commercial family of blue fish such as tuna.
Therefore, when buying, it is advisable Pay close attention to the scientific name of the species on the label if we want to make sure that we are buying authentic northern bonito (Thunnus alalunga) or a specific tuna such as the albacares.
With all that has been seen, it is clear that, although tuna and bonito share a family and look similar at first glance, Their differences include species, size, shape, color, flavor, fishing method, season, gastronomic value, and price. They are remarkable. Knowing them allows you to choose better at the supermarket or fishmonger, enjoy each recipe more, and appreciate the work behind a good preserve or a well-treated fresh bonito.
