Thordisa albomacula 
Thorunna florens 
Thorunna furtive 
Thorunna halourga 
Three Shaped Murex 
Three-lobed T-bar Nudibranch 
Three-tooth Cavoline 
Thuridilla albopustulosa 
Thuridilla carlsoni 
Thuridilla gracilis 
Thuridilla lineolata 
Thyca crystallina 
Tiger cowrie 
Tiger Siphopteron 
Tiled Pleurobranch 
Toga Mantleslug 
Tortoise limpet 
Trapania gibbera 
Trapania kamagong 
Trapania lemanioides 
Trapania lemnalioides 
Trapania miltabrancha 
Trapania palmula 
Trapania scurra