If I can't find Osetra Caviar, what is the closet caviar to it?

Beluga is the most expensive, Mallosa, Severga, and they used to sell at a place in NY City one known as Kamchatka a bottom of the barrel broken one, now you can get Iranian, Russian, American, Chinese, sturgeon, paddlefish, hackleback, salmon, trout, whitefish. Do not buy the cheap lumpfish as it is dyed.