Types Of Tuna

Tunas, alongside mackerels and bonitos, belong to the Scombridae family, and are further classified within the Thunnini tribe, a grouping that encompasses all tuna species, highlighting their shared evolutionary lineage.

There are 15 species of tuna. In the commercial tuna market, there are 7 “main” species and 8 “minor” species. Here we focus on the seven main types of tuna: Skipjack, Albacore, Yellowfin, Bigeye, Atlantic Bluefin, Pacific Bluefin, and Southern Bluefin.

MAIN VS MINOR TYPES

The commercial fishing market is broken into the main and minor species of tuna listed below. The eight minor species are still caught commercially and recreationally but not nearly in the volume as the main seven.

7 Main Types	8 Minor Types
Skipjack	Black Skipjack
Albacore	Blackfin Tuna
Yellowfin	Bullet
Bigeye	Frigate
Atlantic Bluefin	Kawakawa
Pacific Bluefin	Longtail or Tongol
Southern Bluefin	Little tunny
	Slender

CATCH VOLUME BY SPECIES

According to the most recent data from ISS Foundation, in 2022, the total catch of main commercial tuna types was 5.2 million tons. You can see below that skipjack and yellowfin account for a whopping 87% of all tuna caught in the world.

SIZE BY SPECIES

The below figures show the dramatic differences in size between the main tuna types. For example, you’d need to catch 27 Skipjack to equal one Atlantic Bluefin!

Tuna Species	Maximum Weight	Maximum Length
Skipjack Tuna	75 lbs	3.5 ft
Albacore Tuna	90 lbs	5 ft
Yellowfin Tuna	400 lbs	7 ft
Bigeye Tuna	400 lbs	8 ft
Atlantic Bluefin Tuna	2,000 lbs	10.5 ft
Pacific Bluefin Tuna	990 lbs	10 ft
Southern Bluefin Tuna	1,210 lbs	8 ft

Note: these figures are estimates and will vary based on age, location, and the individual fish.

MAIN TYPES OF TUNA

Here we profile each of the seven major tuna species in greater detail.

SKIPJACK

Latin Name: Katsuwonus pelamis

Maximum Weight and Length: 75 lbs, 3.5 ft

Habitat: Tropical and warm temperate waters worldwide, but mainly in the Atlantic Ocean, Indian Ocean, and Pacific Oceans. They’re often found in large schools near the surface.

Distinguishing Features:

• Iridescent blue with black markings on the back
• Bullet-shaped body
• Tender meat, often used for canning
• Smaller size compared to other tuna species
• Learn more about Skipjack

Taste and Texture: Skipjack has a stronger, fishier flavor and a softer texture than most other species.

YELLOWFIN

Latin Name: Thunnus albacares

Maximum Weight and Length: 400 lbs, 7 ft

Habitat: Tropical and subtropical waters worldwide, often near the surface or associated with floating objects. It can be found in warm currents in the Mediterranean, primarily in the eastern basin.

Distinguishing Features:

• A yellow dorsal fin and yellow sides
• Long second dorsal fin
• Dark blue-black back and silver-white belly
• Moderately large eyes
• Yellow finlets on the tail
• Also known as ‘ahi’ (Bigeye is also sometimes called ahi)

Taste and Texture: Yellowfin tuna has a bolder flavor and softer texture than albacore. This makes it ideal where a richer tuna taste is desired, such as sandwiches or pasta dishes.

ALBACORE

Latin Name: Thunnus alalunga

Maximum Weight and Length: 90 lbs, 5 ft

Habitat: Temperate and tropical waters worldwide, often preferring deep offshore areas.

Distinguishing Features:

• Elongate, fusiform body with a conical snout
• Large eyes
• Remarkably long pectoral fins
• Deep blue dorsally and shades of silvery white ventrally
• Unique diet preference for cephalopods (such as octopuses, squids, and cuttlefish)

Taste and Texture: Milder flavor than most tunas and meaty texture makes it suitable for many dishes, from salads to casseroles.

BIGEYE

Latin Name: Thunnus obesus

Maximum Weight and Length: 400 lbs, 8 ft

Habitat: Deeper, warm waters in tropical and subtropical regions, often near islands or seamounts.

Distinguishing Features:

• Large, deep-bodied, streamlined fish
• Large head and eyes
• Very long pectoral fins
• 13 or 14 dorsal spines
• Unique physiology allowing them to forage in deeper, colder waters
• Also known as ‘ahi’ (Yellowfin is also sometimes called ahi)

Taste and Texture: Rich, sweet flavor with a clean, less “fishy” profile. The texture is firm and tender, ideal for searing or raw preparations.

ATLANTIC BLUEFIN

Latin Name: Thunnus thynnus

Maximum Weight and Length: 2,000 lbs, 10.5 ft

Habitat: Western and Eastern Atlantic Ocean, with the Mediterranean as a significant spawning ground. This species migrates long distances and is often found in cooler waters. 

Distinguishing Features:

• Distinguishing Features:
• Dark blue coloring on the top and a gray or shimmering white coloring below
• Gold shimmer to the entire body
• Dark red meat
• Tips of pectoral fins do not reach the front of the second dorsal fin

Taste and Texture: Mild, buttery, and savory flavor, with a subtle sweetness. The texture is firm and smooth, often enjoyed raw in sushi and sashimi.

PACIFIC BLUEFIN

Latin Name: Thunnus orientalis

Maximum Weight and Length: 990 lbs, 10 ft

Habitat: The Pacific Ocean, ranging from east to west, and known for long-distance migrations.

Distinguishing Features:

• Black or dark blue dorsal sides with a grayish-green iridescence
• Small eyes compared to other tuna species
• Pectoral fin tips do not reach the front of the second dorsal fin

Taste and Texture: Pacific Bluefin has a distinct, succulent flavor with an oceanic essence. Its texture is firm and slightly chewy.

SOUTHERN BLUEFIN

Latin Name: Thunnus maccoyii

Maximum Weight and Length: 1,210 lbs, 8 ft

Habitat: The southern hemisphere’s temperate and cold waters, often found in the open ocean.

Distinguishing Features:

• Found in open southern Hemisphere waters mainly between 30°S and 50°S
• Maintains body core temperature up to 10°C above ambient temperature
• Unique respiratory and circulatory adaptations for high metabolic demand

Taste and Texture: Southern Bluefin is buttery, smooth, and has a melt-in-your-mouth tender feel because it is marbled with fat.

NUTRITION AND HEALTH BENEFITS 

The U.S. Food and Drug Administration recommends adults to eat 2 to 3 servings of a variety of cooked fish, or about 8 to 12 ounces, per week. Tuna, in particular, is rich in protein, vitamin D, vitamin B12, potassium, and also features EPA and DHA omega-3 fatty acids. Protein is essential for building strong bones, muscles, cartilage, and skin. Vitamin D is critical for bone health and supports the immune system. Vitamin B12 is necessary for red blood cells, nerve function, and DNA production. EPA and DHA omega-3s play a key role in the inflammatory pathways in the body and also support brain, heart and eye health. Learn more about how tuna is good for you.

TUNA IN CANS AND PACKETS

Most canned or pouched tuna comes from skipjack, yellowfin, or albacore tuna. Light or chunk light tuna is typically a mix of skipjack and yellowfin, sometimes including tongol or bigeye tuna. These varieties are commonly used for classic dishes such as tuna macaroni salad and tuna melts. Albacore, known for its light-colored flesh, firm texture, and mild flavor, is considered white tuna, including solid white and chunk white. Some people prefer it over light tuna for dishes such as tuna patties that require a milder flavor and a firmer, more steak-like fish. The National Fisheries Institute states that about 70% of canned and pouched tuna consumed in the United States is skipjack (or a small amount of yellowfin tuna), with around 30% being albacore.

Sources:

• https://www.iss-foundation.org/tuna-stocks-and-management/tuna-fishing/tuna-species
• https://ocean.si.edu/ocean-life/fish/big-tunas
• https://www.fisheries.noaa.gov/find-species
• https://www.americanoceans.org/marine-life-species/
• https://www.fda.gov/food/consumers/questions-answers-fdaepa-advice-about-eating-fish-those-who-might-become-or-are-pregnant-or#II