Tonna berthae is a species of large sea snail or tun snail, a marine gastropod mollusc in the family Tonnidae, the tun shells.
Distribution This species is endemic to South Africa.
Shell description The shell height is up to about 90 mm.
References
Bouchet, P.; Fontaine, B. (2009). List of new marine species described between 2002-2006. Census of Marine Life.
External links http://www.marinespecies.org/aphia.php?p=taxdetails&id=389269