Syrinx Aruanus Also known as the Australian Trumpet is a very large marine gastropod in the family of Turbinellidae. Known to grow up o 35 Inches in size making it the largest current species of Shelled Gastropod only beaten by Fossil Gastropods of the previous era's, found in the northern part of Australia and Papua New Guinea this giant eats marine Polychaete Worms with its long proboscis