The name applies to four genera and 25 species, each of which can be anywhere from three to 16 feet long, with bony scales, tapered head, and a mouth on the underside.  
The name applies to four genera and 25 species, each of which can be anywhere from three to 16 feet long, with bony scales, tapered head, and a mouth on the underside.  The largest is a 16-foot, two-ton creature found in the Caspian Sea and commonly known as beluga.  For ten points, name this type of fish, whose eggs are served as caviar.
The name applies to four genera and 25 species, each of which can be anywhere from three to 16 feet long, with bony scales, tapered head, and a mouth on the underside.  
sturgeon