It depends probably but I'm sure some areas the name of different foods are imprecise. Does caviar mean all fish eggs? all black fish eggs? Beluga, Ossetra or S

It depends probably but I'm sure some areas the name of different foods are imprecise. Does caviar mean all fish eggs? all black fish eggs? Beluga, Ossetra or Sevruga sturgeon eggs? What about True cod. ect.