Here are some more facts that Alexandre Petrossian says you need to know about black caviar:

Here are a few more facts you need to know about black caviar, according to Alexandre Petrossian
(Petrossian fine food company):

- black caviar is one of the most ancient delicacies.

Before oysters, champagne, and even truffles, black caviar was coveted by kings and aristocrats. The ancient Greeks, Romans, and Russian tsars went broke for black caviar.

- black caviar was originally harvested by Russian and Persian fishermen in the Caspian Sea. The term referred only to caviar from sturgeon - Osetra, Sevruga, and Beluga. Now, all 26 species of sturgeon are used to produce caviar.

- the quality of caviar is judged by its color, smell, texture, and maturity.
The best caviar comes from older fish, with larger eggs and a lighter color. Young fish have darker caviar and a less fishy taste.

- caviar can be stored for more than one day. Since this is technically selected caviar, it can now be stored longer. Keep an opened jar as close to the freezer as possible.

- caviar as wine. Caviar lovers and VIPs scour the reserves for caviar. Previously, such caviar was reserved for monarchs.

- caviar as an antidepressant. Historically, black caviar was prescribed to treat depression. Do you feel better if someone treats you to caviar? This is not so far from the truth - recent studies show that large doses of Omega-3 acids, which black caviar is rich in, can relieve symptoms of depression and bipolar disorder. Black caviar is also prescribed for impotence.

- caviar - audible. A caviar specialist must have an ear for music. When the eggs rub against each other, a light sound is heard - it is somewhat similar to a cat's purring.

- there can be a lot of caviar. Some of the 26 species of sturgeon are endangered, but all are severely depleted, according to the Monterey Bay Aquarium Seafood Watch. Therefore, it is recommended to switch to farming white sturgeon and paddlefish for caviar production.

- Beluga caviar has been banned in the United States since 2005 due to the threat of extinction. The most expensive caviar was recorded from a 100-year-old fish.

- Blinis with sour cream and caviar are considered traditional, but originally Russians preferred to eat black caviar with baked potatoes. Nowadays, caviar appears in everything from pizza to hamburgers.

https://www.foodrepublic.com/2012/10/25/13-things-you-didnt-know-about-caviar/