Caviar, also known as caviar, a pickled product of sturgeon and salmon eggs. It means fish eggs in Persian. Narrowly defined, caviar specifically refers to sturgeon eggs, generally considered to be produced in the bordering Iran and the Russian Caspian Sea caviar is of good quality, fishy and salty taste, color and lustre.

Sturgeon caviar is made from the eggs of sturgeon and is the most authentic caviar. Many roe sauces on the market are made from the eggs of salmon, black salmon, and sockeye salmon, which are much less valuable than sturgeon roe sauce.

The sturgeon is the world's largest individual fish, the earliest, the longest life, the slowest growth, the most vigorous life in the water "living fossil". Sturgeon life expectancy can be up to a hundred years or more, the growth rate is very slow, the number has been very rare.

The salmon roe is processed salmon eggs, salmon is one of the world's valuable fish, has a high nutritional value, enjoy the "water treasures" reputation.

In summary, sturgeon roe production is less and high quality, while the salmon, although valuable, but the number of more than the former, as the saying goes: rare is expensive, so sturgeon roe is better.