The osetra sturgeon (Acipenser gueldenstaedtii), also spelled oscietra or ossietra, is a large freshwater and brackish-water fish native to the Caspian Sea, Black Sea, and their tributary rivers. It is best known as the source of osetra caviar — considered one of the finest and most expensive caviars in the world.
Osetra caviar is characterised by medium-sized eggs that range in colour from dark brown to golden, with a rich, nutty flavour that distinguishes it from other caviar types. The golden eggs from older fish (sometimes marketed as “Imperial” caviar) are particularly prized.
Wild osetra sturgeon populations have been devastated by overfishing, habitat loss, and dam construction across their native range. The species is listed as critically endangered by the IUCN, and international trade in wild Caspian caviar is heavily restricted under CITES. Today, most osetra caviar comes from aquaculture operations.
How it's produced
Historically, osetra sturgeon were caught wild in the Caspian and Black Sea basins, with the roe carefully extracted and salt-cured to produce caviar. Decades of overharvesting and environmental degradation have made wild-caught osetra caviar rare and in many cases illegal.
Modern osetra caviar is predominantly farmed. Aquaculture operations raise sturgeon in controlled freshwater environments — ponds, tanks, or recirculating systems — in countries including Italy, France, Israel, China, and the United States. Farming osetra is a long-term investment: females take 8 to 12 years to reach maturity and produce roe. The eggs are harvested, rinsed, salted using the traditional malossol (low-salt) method, and graded by size, colour, and firmness before packaging.
What it costs the planet (per kilo)
≈ Estimated from its category — typical for fish & seafood, not measured for this item yet. Sources & methods →
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