It means the oil comes from Euphausia superba, a krill species caught in the Southern Ocean around Antarctica — which is true of nearly every krill oil sold in America, including the cheapest bottle on the shelf. “Antarctic” is the most common word in the category and the least useful one for telling two bottles apart.
We sell krill oil. Ours is Antarctic too. So read this as a label-decoding guide from someone with no way to win the comparison — because on this particular word, there is no comparison to win.
One species, one ocean, one set of rules
Commercial krill oil is, with rare exceptions, made from one animal: Euphausia superba, Antarctic krill. The fishery operates in Area 48, the southwest Atlantic sector of the Southern Ocean, and it is managed by CCAMLR, the international commission that sets the catch limits for Antarctic waters.
The scale is public record. The fleet caught 498,350 tonnes of Antarctic krill in 2024 and 624,918 tonnes in 2025 — the year the fishery hit its 620,000-tonne trigger level for the first time and was closed early, on the first of August. Whether that harvest is sustainable is a fair question with an interesting answer, and we wrote it up honestly in Is Krill Endangered?
Here is what that means for the label: when a bottle says “Antarctic,” it is telling you the krill came from the same ocean as everybody else’s krill, caught under the same rules as everybody else’s krill. It is a true statement. It is also the supplement-aisle equivalent of a wine label announcing the wine was made from grapes.
The part no label prints: most krill oil comes from the same few ships
Antarctic krill is not caught by a thousand little boats. It is caught by a short list of large factory vessels, and the concentration is remarkable: the Norwegian fleet operated by Aker QRILL — spun out of Aker BioMarine, the biggest name in the business — took roughly 63% of the entire world catch in 2024 and 52% in 2025. Most of the rest came from Chinese and Korean vessels.
Most krill oil brands do not fish. They buy oil — or raw krill meal — from a handful of ingredient suppliers, put it in softgels, and design a label. Superba™ is an ingredient brand of Aker BioMarine; Rimfrost is another supplier; there are a few more. Do the arithmetic on that market share and you land on a fact no front label will ever tell you: two competing bottles with different names, different prices, and different marketing stories can contain oil that came off the same ship in the same season. The word “Antarctic” cannot distinguish them, because it is true of both. The supplier name could — and almost nobody prints it.
For the record: Captains runs its own operation, and the catch is pressed mechanically right on the boat, no chemicals at any stage. That is a claim about process, not about ocean. The ocean we share with everyone.
Is there krill oil that isn’t Antarctic?
A little. North Pacific krill (Euphausia pacifica) is harvested off Japan, mostly for food and bait, and a small amount becomes oil. It is a genuinely different animal — its oil carries a fatty-acid metabolite called 8-HEPE at levels more than ten times higher than Antarctic krill oil, which researchers find interesting but which has far less human evidence behind it than EPA and DHA. Northern krill exists in the Atlantic too. You will rarely meet either in an American supplement aisle.
If you want to check, skip the front of the box and read the Supplement Facts panel — the species should be named there. If it says Euphausia superba, it is Antarctic krill by definition, whether or not the front label spends the word.
What “Antarctic” doesn’t tell you — which is everything that matters
Two bottles from the same ocean can hold very different oil, because the word on the front says nothing about what happened between the net and the bottle.
It doesn’t tell you the process. Most krill is cooked into meal on the ship, sacked, shipped across the world, and processed into oil at a factory months later. A minority of operations — ours included — press the oil from fresh catch on board. We laid the whole chain out, step by step, in Boat to Bottle.
It doesn’t tell you the composition. A comprehensive 2020 review found commercial krill oils range from about 39% to 81% phospholipids — a twofold spread in the very component krill oil is bought for, between products that all say “Antarctic” on the front.
It doesn’t tell you the clock. Krill are small and full of aggressive digestive enzymes, and the catch starts breaking down within the hour — the industry’s own patent literature says processing should begin within 60 minutes of the catch landing on deck, preferably within 15. Freshness in krill oil is decided in the first hour after the net comes up, not by the latitude printed on the box.
And the “pristine Antarctic waters” pitch?
Partially real. The Southern Ocean is genuinely remote, krill sit near the bottom of the food chain, they live short lives, and measured mercury levels in Antarctic krill are genuinely low — orders of magnitude below the big predatory fish. That part of the story holds up.
But a clean ocean is not the same thing as a clean bottle. In the one published lab test of eleven krill oil brands, mercury — the metal buyers ask about — passed across the board, while lead — the metal nobody asks about — exceeded the EU limit in all eleven. We covered that inversion, sources and all, in Does Krill Oil Contain Mercury or Heavy Metals? The water can’t do your quality control for you.
You might not need us
If “Antarctic” was your reason for reaching for a premium bottle, put it back — the $19 bottle beside it is from the same ocean, under the same rules, and possibly off the same ship. Compare bottles on EPA+DHA per softgel and on how the oil was handled, not on a geography they all share.
If you eat fatty fish twice a week, you likely don’t need any krill oil, ours included — sardines don’t have a front label and don’t need one.
And if the North Pacific krill research is what caught your eye, we don’t sell that species and we’re not going to pretend our oil is a substitute for it.
A note on Captains
Captains Krill Oil™ is Antarctic krill oil, same as nearly everyone. Here is the part of our label that isn’t shared: the oil is pressed mechanically on the boat, right after the catch, no chemicals at any stage — not shipped across the world as meal to be reprocessed months later. It’s a natural oil from a wild catch, so it varies a little lot to lot; we test lots at random and they come back strong, and documentation is available on request. Twenty years, small family business. If the word “Antarctic” is what sells you, any bottle on the shelf qualifies. If the first hour after the net matters to you, that’s the hour we built the whole operation around.
Quick answers
Is all krill oil from Antarctica?
Nearly all. Commercial krill oil is almost always made from Euphausia superba, the Antarctic species, caught under CCAMLR management. The main exception is North Pacific krill (Euphausia pacifica), harvested off Japan, which rarely appears in American supplements.
Is Antarctic krill oil better than regular krill oil?
In an American store the comparison is mostly meaningless, because “regular” krill oil is Antarctic too. The real differences between bottles are phospholipid content, EPA+DHA per softgel, and how the oil was processed — none of which the word “Antarctic” tells you.
Does “Antarctic” mean the oil is purer?
The ocean is genuinely clean and measured mercury in krill is genuinely low. But bottle quality is set by handling and testing, not latitude — in the one published 11-brand test, every product passed on mercury and every product exceeded the EU lead limit.
What species should a krill oil label name?
Euphausia superba, in the Supplement Facts panel. If that’s the species named, the krill is Antarctic by definition. If the label names Euphausia pacifica, it’s North Pacific krill — a different animal with different chemistry.
Who actually catches Antarctic krill?
A short list of large factory vessels from Norway, China, and Korea, all under CCAMLR rules. The Norwegian fleet alone took roughly half to two-thirds of the world catch in recent seasons, and most brands buy from the same few suppliers rather than fishing themselves.
Honest answer, not a pitch. — captainskrilloil.com