Stout Tagelus 
Strawberry Nudibranch 
Striped Greenhouse Slug 
Striped Phyllidiopsis 
Stubby Squid 
Sulfur Cone 
Sultana sultana 
Swan conch 
Sydney Cockle 
Sydney Seahare 
Sypharochiton pelliserpentis 
Tambja mediterranea 
Tambja mullineri 
Tambja olivaria 
Tanea undulata 
Tapering cowry 
Tapestry Turban Snail 
Taringa halgerda 
Tenellia bughaw 
Tenellia melanobrachia 
Tenellia punicea 
Terebellum Conch 
Textile Cone 
Thecacera picta