Caviar is just simply fish roe (eggs). Though the best comes from the Beluga Sturgeon, one can always make do with lumpfish or salmon caviars at around £5 a jar.
Beluga Caviar which comes from the Caspian sea can cost at least £2000 a kilo.
It is the most expensive food item in the world!
Sturgeons can weigh up to two tonnes and prized more for their eggs than their meat.
Caviar is usually served on a warm toast for very special occasions.
I personally have tried real Caviar only once and, though I liked it very much, I still do no see what the fuss is all about.
(photo courtesy of Wikipedia)