Spectacular corolla 
Spengler's Trumpet Snail 
Sphincterochila prophetarum 
Sphincterochila zonata 
Spider conch 
Spinophallus falciphallus 
Spotted sea hare 
Spotted Seahare 
Starry moon snail 
Stiliger smaragdinus 
Strawberry Nudibranch 
Striped Greenhouse Slug 
Striped Phyllidiopsis 
Sulfur Cone 
Sultana sultana 
Swan conch 
Sydney Seahare 
Tambja mediterranea 
Tambja mullineri 
Tambja olivaria 
Tanea undulata 
Tapering cowry 
Tapestry Turban Snail 
Taringa halgerda