Beluga, Ossetra and Sevruga: The Classic Three Compared

Brown beads flecked with gold, a crisp texture, lingering nut notes: Caviar Giaveri's description of its Russian sturgeon Ossetra gives one of caviar's grandest names a tangible character. Yet Beluga, Ossetra and Sevruga are not three quality grades. They are three traditional names for roe from different fish.

Beluga means the species CITES lists as Huso huso. Ossetra usually means Russian sturgeon, Acipenser gueldenstaedtii, but can also mean Persian sturgeon, Acipenser persicus. Sevruga means stellate sturgeon, Acipenser stellatus. Farmed examples can enter legal trade, though beluga faces additional US restrictions and Ossetra calls for a closer species check.

Beluga, Ossetra and Sevruga compared

Start with the fish, rather than the prestige of the name. Ossetra, also written Osetra or Oscietra, commonly refers to Acipenser gueldenstaedtii, but also appears on Persian sturgeon, Acipenser persicus. The table sets out the three principal identities, their typical egg sizes and their conservation status.

These are typical biological egg diameters, rather than guaranteed sizes for finished salted caviar. The beluga range includes measurements of mature Volga eggs; published retail bead sizes can differ. Notice the overlap: neither diameter nor colour can identify a species alone, however convincing the resemblance.

Persian sturgeon has its own CITES code, PER, and was also Critically Endangered in the 2022 update. No comparable verified bead range is documented, so none is supplied here. The Red List update date is distinct from each species' individual assessment date.

How they became the classic three

The wild caviar trade centred on the Caspian Sea made these names famous, particularly through Russian and Iranian production. FAO's historical account groups Russian and Persian sturgeon roe as Osetra, alongside beluga and Sevruga. The classic three belong to that trading tradition; they do not encompass every sturgeon or every caviar made today.

Nor do the names tell you where the fish was raised. Russian sturgeon can be farmed outside Russia, and beluga need not come from the Caspian. For a broader introduction to roe, species and terminology, start with caviar for beginners.

What the beads look and feel like

Beluga has the largest upper egg diameter in the table. FAO describes its caviar as light to dark grey; Petrossian calls it creamy, while Caviar Giaveri uses delicate and buttery. These are the companies' tasting terms, rather than a promise about every tin. Across all three names, the producer's batch description is the better guide to a particular tin.

Ossetra offers a broader colour picture than one photograph can capture. Alongside Giaveri's brown, gold-flecked Acipenser gueldenstaedtii beads, with their crisp texture and lingering nut notes, FAO's older trade account records grey and golden descriptions under Osetra.

Sevruga sits at the smaller end of the published egg ranges, but its flavour has a forceful reputation. FAO describes shades from dark to light grey and, citing a trade source, calls it the boldest tasting of the three. Giaveri likewise describes its Sevruga as stronger tasting, with fresh, marine notes. Other producers use their own terms for its texture.

These are differences to explore, not a hierarchy to memorise. The label declares which fish supplied the roe; the batch description indicates the character intended for that particular caviar. The individual guides to beluga caviar, Russian sturgeon Ossetra and stellate sturgeon Sevruga take those distinctions further.

Where the fish are farmed

Beluga farming reaches well beyond the Caspian. The European Commission reports it in Belgium. In Italy, Giaveri lists Huso huso at its operation, while Kaluga Queen's June 2026 prospectus records beluga stock in China. These are documented examples, rather than a complete global farm census, and a firmer starting point than assumptions based on a brand's nationality.

Russian sturgeon appears in both the European Commission's Belgian account and Kaluga Queen's Chinese stock disclosures. For stellate sturgeon, turn to Giaveri's farm page: it lists Acipenser stellatus among the species at its Italian farm.

That same page lists Persian sturgeon in Italy, although Giaveri's current Oscietra Classic page names Russian sturgeon. Check the specific product: one house's Ossetra need not all come from the same species. The separate guide explores Persian sturgeon and the Ossetra name and the Ossetra Name).

Florida needs a more precise reading. A 2017 federal notice documents Sturgeon AquaFarms' beluga stock, but grants an exemption for meat only, excluding caviar and live fish. It does not establish current caviar authorisation, and current production of pure beluga at the facility is not documented.

Conservation and legal trade are different questions

Critically Endangered is an assessment of extinction risk in the wild. The 2022 Red List update placed beluga, Russian, Persian and stellate sturgeon in that category; it did not ban every farmed product. Equally, the existence of farms says nothing by itself about the recovery of wild populations or the legality of a particular consignment.

For wild Caspian sturgeon, the five coastal states agreed to continue their commercial fishing ban through 2026. Catches are allowed only for science and reproduction within agreed quotas. International trade also depends on wildlife rules: in the EU, permits for shared wild stocks require established export quotas. Past trade does not confer present permission.

In the EU and UK, farmed caviar from these species is not automatically prohibited. Lawful origin, applicable trade documents and labelling remain essential. Great Britain's APHA guidance and the EU wildlife trade framework are separate references; Northern Ireland follows the relevant EU arrangements. Domestic sale and a journey across a border raise different legal questions.

Sevruga sits at the smaller end of the published egg ranges, but its flavour has a forceful reputation.

The US treats beluga separately. Imports from the Caspian and Black Sea basins have been suspended since 2005. Under 50 CFR 17.44(y), aquaculture facilities outside those coastal states can receive conditional, facility-specific exemptions, rather than blanket permission for farmed beluga; see the US beluga rule. For Ossetra and Sevruga, US CITES rules govern international shipments without this beluga-specific exemption route.

Travellers should check the actual journey before packing a tin. Great Britain's guidance describes a personal effects exemption of up to 125 g per person for eligible Appendix II caviar, for personal use in individually marked containers bearing CITES labels. This is not a worldwide allowance, and species restrictions and other entry requirements still apply. Check both countries' wildlife and food-entry requirements before carrying any of these caviars internationally.

Names and labels: what to check

Imperial, Royal and Golden describe a producer's selection, not a species or a universal legal grade. Their meaning depends on that producer's rules. Even the traditional beluga colour designations 000, 00 and 0 are a trading convention, rather than a legal quality ladder. The guide to caviar trade names explains how to read them.

Kaluga Beluga deserves particular scrutiny if the phrase suggests Huso huso but the roe comes from kaluga or a hybrid. Ask for the scientific identity. A hybrid is a cross between species, and its label should declare that cross clearly.

Read the species code against the declared fish. Then check the source code, which identifies wild or captive origin, together with the country of origin, year, plant and lot details. Requirements vary by jurisdiction and according to whether the caviar has been repacked. On repacked caviar, the country of origin remains separate from the repacker's identity: a repacking address does not tell you where the fish was raised.

A CITES label gives a trail to follow, but cannot authenticate the contents by itself. In a 2023 study of 21 caviar batches obtained by purchase or gift in China, researchers using mitochondrial markers found seven discrepancies with labels. That testing examines biological identity, something a consumer cannot establish by looking at the beads.

Scientific names are also under discussion. Readers may encounter new genus names following taxonomy proposals published in 2025. At their October 2025 meeting, the IUCN Sturgeon Specialist Group and World Sturgeon Conservation Society did not support that proposed revision. They proposed a more conservative classification that dissolves Huso, making beluga Acipenser huso. This comparison keeps the names used in CITES records, so a proposed scientific renaming is not confused with a different caviar.