Least concern
117 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Snowflake Moray | — | — | Echidna nebulosa | LC | — | |
| Snubnose Dart | — | — | Trachinotus blochii | LC | — | |
| Sombre Lieutenant | — | — | Brachydiplax sobrina | LC | — | |
| Sooty Tern | — | புகைப் பழுப்பு நிற ஆலா | Onychoprion fuscatus | LC | — | |
| South Indian Flying Barb | — | — | Esomus thermoicos | LC | — | |
| Southern Hill Myna | — | தெற்கு மலை நாகணவாய் | Gracula indica | LC | — | |
| Spangled Emperor | — | — | Lethrinus nebulosus | LC | — | |
| Speckled Butterflyfish | — | — | Chaetodon citrinellus | LC | — | |
| Speckled Goby | — | — | Redigobius bikolanus | LC | — | |
| Speckled Snapper | — | — | Lutjanus rivulatus | LC | — | |
| Spiketail Gourami | — | — | Pseudosphromenus cupanus | LC | — | |
| Spine-Bellied Sea Snake | — | குறுகிய கடல் பாம்பு | Hydrophis curtus | LC | — | |
| Spinner Dolphin | ඩොල්ෆින් (බමන මුල්ලා) | சுழல் டொல்பின் | Stenella longirostris | LC | — | |
| Spot-Bellied Eagle-Owl | — | பெரிய காட்டு ஆந்தை | Ketupa nipalensis | LC | — | |
| Spotfin Lionfish | — | — | Pteropterus antennatus | LC | — | |
| Spotfin Squirrelfish | — | — | Neoniphon sammara | LC | — | |
| Spotted Boxfish | — | — | Ostracion meleagris | LC | — | |
| Spotted Dove | — | மணிப்புறா | Spilopelia chinensis | LC | — | |
| Spotted House Gecko | — | — | Hemidactylus parvimaculatus | LC | — | |
| Spotted Joker | — | — | Byblia ilithyia | LC | — | |
| Spotted Oceanic Triggerfish | — | — | Canthidermis maculata | LC | — | |
| Spotted Porcupinefish | — | — | Diodon hystrix | LC | — | |
| Spotted Ricefish | — | — | Oryzias carnaticus | LC | — | |
| Spotted Scat | — | புள்ளி இலத்தி | Scatophagus argus | LC | — | |
| Spotted Sicklefish | — | — | Drepane punctata | LC | — | |
| Spotted Snakehead | — | சன்னா பங்டேட்டா | Channa punctata | LC | — | |
| Spotted-Face Surgeonfish | — | — | Acanthurus maculiceps | LC | — | |
| Square-Tailed Bulbul | — | தென்னிந்தியக் கருப்பு சின்னான் | Hypsipetes ganeesa | LC | — | |
| Sri Lanka Bay Owl | — | இலங்கை விரிகுடா ஆந்தை | Phodilus assimilis | LC | Endemic | |
| Sri Lanka Bronze Skink | — | — | Eutropis madaraszi | LC | Endemic | |
| Sri Lanka Drongo | ශ්රී ලංකා සිළු මහ කවුඩා | இலங்கை கரிச்சான் | Dicrurus lophorinus | LC | Endemic | |
| Sri Lanka Green-Pigeon | ශ්රී ලංකා බටගොයා | இலங்கை பச்சை புறா | Treron pompadora | LC | Endemic | |
| Sri Lanka Grey Hornbill | අළු කෑදැත්තා | இலங்கை சாம்பல் இருவாச்சி | Ocyceros gingalensis | LC | Endemic | |
| Sri Lanka Hanging Parrot | ගිරා මලිත්තා | இலங்கை தொங்கும் கிளி | Loriculus beryllinus | LC | Endemic | |
| Sri Lanka Junglefowl | වලිකුකුළා | இலங்கைக் காட்டுக்கோழி | Gallus lafayettii | LC | Endemic | |
| Sri Lanka Labeo | — | — | Labeo heladiva | LC | Endemic | |
| Sri Lanka Lowland Hooktail | — | — | Paragomphus campestris | LC | — | |
| Sri Lanka Scimitar-Babbler | ශ්රී ලංකා දෑ-දෙමලිච්චා | இலங்கை கூன்வாள் சிலம்பன் | Pomatorhinus melanurus | LC | Endemic | |
| Sri Lanka Spurfowl | හබන් කුකුළා | இலங்கைச் சுண்டங்கோழி | Galloperdix bicalcarata | LC | Endemic | |
| Sri Lanka Swallow | ශ්රී ලංකා වැහිලිහිණියා | இலங்கை தகைவிலான் | Cecropis hyperythra | LC | Endemic | |
| Sri Lanka White-Eye | — | இலங்கை வெள்ளைக் கண்ணி | Zosterops ceylonensis | LC | Endemic | |
| Sri Lanka Wood Frog | — | கைட்ரோபைலக்சு கிராசிலிசு | Hylarana gracilis | LC | Endemic | |
| Sri Lanka Woodshrike | — | இலங்கை காட்டுக் கீச்சான் | Tephrodornis affinis | LC | Endemic | |
| Sri Lankan Birdwing | මහ කුරුලු පිය පැපිලියා | இலங்கை அழகி | Troides darsius | LC | Endemic | |
| Sri Lankan Spotted Chevrotain | මීමින්නා | இலங்கைச் சருகுமான் | Moschiola meminna | LC | Endemic | |
| Sri Lankan Spotted Deer | තිත් මුවා | புள்ளிமான் | Axis axis ceylonensis | LC | Endemic subspecies | |
| Star-Eye Parrotfish | — | — | Calotomus carolinus | LC | — | |
| Starry Puffer | — | — | Arothron stellatus | LC | — |
