Monte Christo has live fish sent to Paris from the Volga in a cask with living plants to maintain oxygen supply.
I know caviar is a delicacy (not to me) but I never heard that the sturgeon was eaten.

sterlet
n.
5Russ styerlyad‘6 a small sturgeon (Acipenser ruthenus) found in the Caspian Sea and used as food and as a source of caviar