Skipjack and albacore are two different species of tuna that make up the vast majority of canned tuna sold in the United States. The simplest distinction: albacore is sold as “white tuna,” while skipjack is the primary fish behind “light tuna.” They differ significantly in flavor, texture, mercury levels, nutrition, and price.
Two Different Fish
Albacore (Thunnus alalunga) is the larger of the two, with the all-tackle fishing record at just over 88 pounds. Skipjack (Katsuwonus pelamis) tops out smaller, with a record of about 46 pounds. Skipjack also has a much shorter life cycle and reproduces by age one, which means most skipjack caught have already spawned at least once. That fast reproduction makes them an abundant species with no foreseeable risk to their population numbers. Albacore are still found in good numbers globally but grow more slowly and live longer, which has implications for both sustainability and mercury accumulation.
Flavor and Texture
Albacore has light-colored, almost white flesh with a mild flavor and firm, meaty texture. It holds together well in chunks, making it popular for tuna salads, casseroles, and dishes where you want distinct pieces of fish. If you’ve ever eaten “solid white” tuna from a can, that was albacore.
Skipjack has darker meat and a stronger, fishier taste. Its texture is noticeably softer. Some people find the robust flavor too intense on its own, but it works well when mixed with mayo, seasonings, or sauces that balance it out. In Japanese cuisine, dried skipjack (katsuobushi) is the base of dashi broth precisely because of that concentrated flavor.
What the Labels Mean at the Store
In the U.S., only albacore can legally be labeled “white tuna.” If a can says “light tuna,” it typically contains skipjack, though yellowfin tuna sometimes appears in light tuna blends as well. Skipjack dominates the canned tuna market, making up over 70% of canned tuna sold in the U.S. Albacore accounts for roughly 20%. Because albacore comes in larger, firmer chunks and has milder flavor, it’s generally the more expensive option.
Nutrition Per Serving
Both are excellent protein sources, but they aren’t nutritionally identical. Per 3-ounce serving (packed in water):
- Albacore: 109 calories, 20 g protein, 2.5 g fat, 0.7 g omega-3 fatty acids, 320 mg sodium
- Skipjack: 73 calories, 17 g protein, 0.8 g fat, 0.2 g omega-3 fatty acids, 210 mg sodium
Albacore delivers more than three times the omega-3s per serving, which are the fats linked to heart and brain health. That higher fat content also explains its richer mouthfeel. Skipjack, on the other hand, is leaner with about a third fewer calories, making it a better fit if you’re prioritizing low-calorie protein. It’s also lower in sodium.
Mercury Levels
This is often the deciding factor for people choosing between the two. According to FDA testing data, skipjack averages 0.144 parts per million (ppm) of mercury, while canned albacore averages 0.350 ppm. That makes albacore roughly 2.4 times higher in mercury than skipjack.
The difference comes down to biology. Albacore are larger, live longer, and eat higher on the food chain, so mercury accumulates in their tissue over time. Skipjack’s shorter lifespan means less time to build up mercury.
The EPA and FDA categorize fish into “Best Choices” (lowest mercury) and “Good Choices” (moderate mercury). Skipjack and other light tuna fall into the Best Choices category, while albacore lands in Good Choices. For adults who are pregnant or breastfeeding, the guidance is 2 to 3 servings per week from Best Choices, or 1 serving per week from Good Choices. For children, the recommendation is 2 servings per week from Best Choices. So if mercury is your primary concern, particularly for young children or during pregnancy, skipjack is the safer pick.
Sustainability
Skipjack’s rapid reproduction rate makes it one of the more resilient commercial fish species. Because most skipjack have already reproduced before they’re caught, fishing pressure has less impact on future populations. Albacore stocks are considered healthy globally, though their slower growth makes them somewhat more vulnerable to overfishing in specific regions.
The fishing method matters as much as the species. Pole-and-line and troll-caught tuna have less bycatch (accidental capture of dolphins, turtles, and seabirds) than large-scale purse seine nets. The Marine Stewardship Council’s blue label certifies that a fishery meets standards for stock health, ecosystem impact, and management. If sustainability is a priority, looking for that certification on either species gives you more assurance than the species choice alone.
Which One Should You Buy?
Your choice depends on what you value most. Albacore is the better option if you want mild flavor, firm texture, and the highest omega-3 content. Skipjack wins on price, lower calories, and significantly lower mercury. For families with young children or for anyone eating tuna several times a week, skipjack’s mercury advantage is meaningful.
There’s no reason you can’t eat both. Using skipjack as your everyday tuna and saving albacore for occasions when you want that milder, meatier bite lets you get the best of each while keeping mercury exposure in check.