Fish roe is fish eggs.

Ordinary consumption of fish roe is said to be fish eggs salted or dried products collectively, is a nutritious food, which has a large amount of protein, calcium, phosphorus, iron, vitamins and riboflavin, also rich in cholesterol. Fish roe also contains a large number of vitamins A, B, D and iron and other minerals, as well as a large number of brain phospholipids a class of nutrition.

In Russia, it is customary to repackage caviar with eggs from many sturgeon, but in Iran there are strict quality control standards, and retail jars of less than 20 grams can only be produced from the same fish. Caviar can also be cryogenically sterilized to provide a longer refrigerated shelf life if it is preserved in time.

Grade of roe

Beluga sturgeon, the highest quality sturgeon eggs, produce the world's rarest and most valuable caviar. Beluga caviar ranges from a pale gray to a grayish-black color, and has a delicate transparent film surrounding slightly larger roe, which has been known as the "Pearl of the Caspian Sea. Beluga caviar has been called the "Pearl of the Caspian Sea". The Beluga sturgeon is usually caught in less than 100 fish in a year, which is only 2% of the total sturgeon catch, which is a very small number.

The main reason for the low production is the slow growth of this sturgeon, starting from a juvenile fish to the fish is big enough to mature and spawn about 18 to 20 years, such a long process of growth and gestation, in the Caspian Sea in the increasingly serious situation of abusive fishing, want to live a good life is not an easy thing.