Least concern
117 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Starry Triggerfish | — | — | Abalistes stellatus | LC | — | |
| Stellate River Hawk | ගං බත්කූරා | — | Onychothemis testacea | LC | — | |
| Stocky Hawkfish | ගොරෝසු උකුස්සා මාළුවා | தடித்த பருந்து மீன் | Cirrhitus pinnulatus | LC | — | |
| Stork-Billed Kingfisher | — | தடித்த அலகு மீன்கொத்தி | Pelargopsis capensis | LC | — | |
| Streak-Throated Woodpecker | ඉරි ගෙල කෑරලා | பச்சை மரங்கொத்தி | Picus xanthopygaeus | LC | — | |
| Streaked Seerfish | ඉරි තොරා | வரி வஞ்சிரம் | Scomberomorus lineolatus | LC | — | |
| Streaked Weaver | ඉරි සහිත වියන කුරුල්ලා | வரித் தூக்கணம் | Ploceus manyar | LC | — | |
| Stripe-Headed Threadtail | ඉරි හිස ඉදිකටු මැස්සා | — | Prodasineura sita | LC | Endemic | |
| Striped Barracuda | — | கோடு ஊளி | Sphyraena obtusata | LC | — | |
| Striped Dwarfgoby | ඉරි සහිත ඩ්වාර්ෆ්ගොබි | — | Eviotops sebreei | LC | — | |
| Striped Eel Catfish | ඉරි සහිත මුහුදු මැගුරා | சுங்கான் | Plotosus lineatus | LC | — | |
| Striped Eviota | — | — | Eviota sebreei | LC | — | |
| Striped Large-Eye Bream | — | — | Gnathodentex aureolineatus | LC | — | |
| Striped Snakehead | ලූලා | விரால் மீன் | Channa striata | LC | — | |
| Striped Surgeonfish | — | — | Acanthurus lineatus | LC | — | |
| Striped Triplefin | — | — | Helcogramma striata | LC | — | |
| Sunrise Goatfish | — | நவரை மீன் | Upeneus sulphureus | LC | — | |
| Swamp Barb | වගුරු පෙතියා | சதுப்பு கெண்டை | Puntius chola | LC | — | |
| Swampwatcher | වගුරු බත්කූරා | — | Potamarcha congener | LC | — | |
| Swarthy Parrotfish | කළු ගිරා මාළුවා | கருமை கிளிமீன் | Scarus niger | LC | — | |
| Sykes’s Warbler | — | சைக்கீசு கதிர்க்குருவி | Iduna rama | LC | — |
