Bowfin black caviar. Bowfin Caviar makes an excellent and inexpensive substitute for sturgeon roe. His black caviar comes from wild Bowfin (Amia Calva) which is even more ancient than the sturgeons. The American Bowfin caviar is famous and highly regarded by connoisseurs for its intense flavor, with its mild tang and hints of spice. The greater part of Bowfin black caviar is harvested from wild-caught fish, guaranteeing its fantastic taste!