Near threatened
13 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Sharpnose Sevengill Shark | උල් නාස් හත් ගිල් මෝරා | கூர்மூக்கு ஏழுசெவுள் சுறா | Heptranchias perlo | NT | — | |
| Silver Carp | රිදී කාප් මාළුවා | வெள்ளிக்கெண்டை மீன் | Hypophthalmichthys molitrix | NT | — | |
| Spot-Billed Pelican | ලප හොට පෙලිකන් | சாம்பல் கூழைக்கடா | Pelecanus philippensis | NT | — | |
| Spot-Tail Shark | පුල්ලි වලිග මෝරා | புள்ளி வால் சுறா | Carcharhinus sorrah | NT | — | |
| Spot-Winged Thrush | තිත්පිය තිරාසිකයා | — | Geokichla spiloptera | NT | Endemic | |
| Spotback Loach | — | — | Schistura notostigma | NT | — | |
| Sri Lanka Brook Hooktail | ශ්රී ලංකා ඔය ඉදිකටුවා | இலங்கை ஓடைத் தட்டான் | Paragomphus henryi | NT | Endemic | |
| Sri Lanka Bush Warbler | ශ්රී ලංකා වනරැවියා | இலங்கைப் புதர் கதிர்க்குருவி | Elaphrornis palliseri | NT | Endemic | |
| Sri Lanka Forktail | ශ්රී ලංකා දෙබෑ වලිග බත්කූරා | — | Macrogomphus lankanensis | NT | Endemic | |
| Sri Lankan Spotted Bent-Toed Gecko | ලංකා තිත් වක් ඇඟිලි හූනා | இலங்கை புள்ளி வளைந்த விரல் பல்லி | Cyrtodactylus triedrus | NT | Endemic | |
| Sri Lankan Walking Catfish | හුරුල්ලා | இலங்கை நடைக் கெளிறு | Clarias brachysoma | NT | Endemic | |
| Staghorn Coral | මුව අං කොරල් | மான்கொம்புப் பவளம் | Acropora muricata | NT | — | |
| Streaked Shearwater | — | — | Calonectris leucomelas | NT | — |
