Reticulidia halgerda 
Rhachis bengalensis 
Rhinocochlis nasuta 
Ringed Olive 
Roboastra tentaculata 
Robust lancetooth 
Roman Snail 
Rosy spindle cowry 
Rough Keyhole Limpet 
Rough limpet 
Rough periwinkle 
Rough Turban Shell 
Rounded Snail 
Sacoproteus smaragdinus 
Sagaminopteron nigropunctatum 
Samla bicolor 
Samla bilas 
Samla riwo 
Sap-sucking slug 
Sargassum nudibranch 
Sarika resplendens 
Sclerodoris apiculata 
Sclerodoris tuberculata 
Scorpion Spider Conch