Yes, caviar is fish eggs. More specifically, it’s the salt-cured, unfertilized eggs of sturgeon. That distinction matters: while all caviar is fish eggs, not all fish eggs qualify as caviar. The word “caviar” without any qualifier traditionally refers only to roe from the sturgeon family, a group of ancient fish found primarily in the Caspian Sea, Black Sea, and surrounding waters.
What Makes Caviar Different From Regular Fish Eggs
Fish eggs in general are called roe. Roe is simply the mass of unfertilized eggs found inside female fish or certain marine animals. You’ll find roe from salmon, trout, flying fish, and dozens of other species on restaurant menus and in grocery stores. All of it is fish eggs, but none of it is technically caviar unless it comes from a sturgeon.
The second requirement is processing. Raw sturgeon eggs straight from the fish are still just roe. They become caviar only after being carefully separated from the egg sac, rinsed, and cured with fine salt. The highest quality caviar uses a method called “malossol,” a Russian term meaning “little salt.” Malossol caviar contains less than 5% salt, and most premium varieties come in under 3%. That light touch of salt is enough to preserve the eggs and develop their flavor without masking the delicate, briny taste that makes caviar distinctive.
Which Fish Produce Real Caviar
Traditional caviar comes from three sturgeon species native to the Caspian Sea: beluga, ossetra, and sevruga. Beluga caviar has long been considered the most prized, with the largest eggs and a rich, buttery flavor. Ossetra eggs are medium-sized with a nutty taste, and sevruga produces smaller, more intensely flavored pearls. The sterlet and Russian sturgeon also contribute to the traditional caviar market.
Today, most caviar sold worldwide comes from farmed sturgeon rather than wild-caught fish. Every sturgeon and paddlefish species is listed under CITES, the international treaty governing trade in endangered species. Wild sturgeon populations have been so severely depleted that international law now limits personal imports of caviar to just 125 grams without a permit. Aquaculture operations in countries like China, Italy, Israel, and the United States have filled the gap, producing farmed sturgeon caviar that ranges widely in price and quality.
Why Other Fish Eggs Get Called “Caviar”
Walk through any grocery store and you’ll see products labeled “salmon caviar,” “trout caviar,” or “lumpfish caviar.” This is where labeling gets loose. In the United States, the FDA’s position is clear: the unqualified word “caviar” on a label should refer only to sturgeon roe. If the eggs come from any other fish, the label must include that fish’s name. Selling salmon roe labeled simply as “caviar” could be considered misbranding under federal law.
Most of the rest of the world follows a similar convention. In Europe and much of Asia, “caviar” without a qualifier means sturgeon. But in everyday conversation and on restaurant menus, the word gets applied to just about any cured fish egg, and sometimes to things that aren’t fish eggs at all (seaweed “caviar,” for instance). If you’re paying premium prices, check the label for a sturgeon species name.
Common Fish Eggs You’ll See on Menus
Several types of non-sturgeon roe are popular in restaurants, especially in Japanese cuisine. They’re all fish eggs, but none are caviar in the traditional sense.
- Ikura: Salmon roe. These are noticeably large, bright orange eggs with a pop of rich, oily flavor. You’ll see them on sushi and poke bowls.
- Tobiko: Eggs from flying fish, naturally reddish-orange and tiny, usually under a millimeter across. They have a satisfying crunch and a slightly sweet, smoky taste. Restaurants sometimes color them with wasabi (green) or squid ink (black).
- Masago: Roe from capelin, a small fish in the smelt family. It looks and tastes similar to tobiko but is slightly more bitter and less vibrant in color. Because it’s cheaper, many restaurants substitute masago for tobiko.
How Caviar Is Graded
Not all sturgeon caviar is equal. Experts grade it based on egg size, firmness, color consistency, and flavor. Grade 1 represents the top tier: large, firm, perfectly intact eggs that are uniform in both size and color. Grade 2 is still high quality but may have slightly smaller or less uniform pearls.
Beyond the numbered grades, you’ll see terms like “Imperial,” “Royal,” and “Classic” on tins. These aren’t standardized grades but producer-specific rankings. Imperial generally refers to the rarest selection with the largest, lightest-colored eggs. Royal sits a step below, and Classic describes smaller, darker pearls with a bolder flavor. One reliable quality indicator: the eggs inside a single tin should all be the same color. Uniformity means they came from one fish harvested at peak maturity.
Nutritional Profile
Caviar is nutrient-dense in small quantities. A single serving delivers roughly 236% of your daily recommended vitamin B12, a nutrient essential for nerve function and red blood cell production. It’s also rich in omega-3 fatty acids, the same heart-healthy fats found in salmon and sardines. Because caviar is salt-cured, sodium content is significant, so the typical serving size stays small, usually around 30 grams or about a tablespoon.
Other fish roes share some of these nutritional benefits. Salmon roe is also high in omega-3s and protein. But caviar’s combination of B12 density and omega-3 content in such a concentrated form is what earns it the label “nutritional powerhouse” from dietitians at the Cleveland Clinic.