Least concern
989 species| Photo | English | සිංහල | தமிழ் | Scientific name | IUCN | Endemic |
|---|---|---|---|---|---|---|
| Blackspot Sergeant | — | — | Abudefduf sordidus | LC | — | |
| Blackspot Snapper | — | — | Lutjanus fulviflamma | LC | — | |
| Blackspotted Puffer | — | — | Arothron nigropunctatus | LC | — | |
| Blackspotted Rockskipper | — | — | Entomacrodus striatus | LC | — | |
| Blacktail Snapper | — | மஞ்சள் கீளி | Lutjanus fulvus | LC | — | |
| Blacktip Ponyfish | — | — | Eubleekeria splendens | LC | — | |
| Blacktip Trevally | — | — | Caranx heberi | LC | — | |
| Bleeker’s Hawkfish | — | — | Cirrhitichthys bleekeri | LC | — | |
| Bloch’s Bigeye | — | — | Priacanthus blochii | LC | — | |
| Blotched House Gecko | හෙමිඩැක්ටිලස් ට්රයිඩ්රස් | — | Hemidactylus triedrus | LC | — | |
| Blubberlip | — | — | Plectorhinchus gibbosus | LC | — | |
| Bludger | — | — | Turrum gymnostethus | LC | — | |
| Blue Bush Dart | — | — | Copera vittata | LC | — | |
| Blue Marsh Hawk | — | — | Orthetrum glaucum | LC | — | |
| Blue Pansy | — | நீல வசீகரன் | Junonia orithya | LC | — | |
| Blue Riverdamsel | — | — | Pseudagrion microcephalum | LC | — | |
| Blue Rock-Thrush | — | நீலப் பூங்குருவி | Monticola solitarius | LC | — | |
| Blue Streamgoby | — | — | Sicyopterus lagocephalus | LC | — | |
| Blue Triggerfish | — | — | Pseudobalistes fuscus | LC | — | |
| Blue-Barred Parrotfish | — | — | Scarus ghobban | LC | — | |
| Blue-Breasted Quail | — | அரச காடை | Synoicus chinensis | LC | — | |
| Blue-Cheeked Bee-Eater | — | — | Merops persicus | LC | — | |
| Blue-Faced Malkoha | — | நீலக்கண்ணி | Phaenicophaeus viridirostris | LC | — | |
| Blue-Headed Wrasse | — | — | Thalassoma amblycephalum | LC | — | |
| Blue-Ribbon Wrasse | — | — | Stethojulis trilineata | LC | — | |
| Blue-Spotted Cornetfish | — | — | Fistularia commersonii | LC | — | |
| Blue-tailed Bee-eater | නිල්පෙඳ බිඟුහරයා | நீலவால் பஞ்சுருட்டான் | Merops philippinus | LC | — | |
| Blue-Tailed Forest Hawk | — | — | Orthetrum triangulare | LC | — | |
| Blue-Throated Flycatcher | — | நீலத் தொண்டை நீல ஈபிடிப்பான் | Cyornis rubeculoides | LC | — | |
| Bluefin Trevally | — | — | Caranx melampygus | LC | — | |
| Bluelined Rockcod | — | — | Cephalopholis formosa | LC | — | |
| Bluering Angelfish | — | — | Pomacanthus annularis | LC | — | |
| Bluespine Unicornfish | — | — | Naso unicornis | LC | — | |
| Bluespotted Puffer | — | — | Arothron caeruleopunctatus | LC | — | |
| Bluestreak Cleaner Wrasse | — | — | Labroides dimidiatus | LC | — | |
| Bluestriped Snapper | — | — | Lutjanus kasmira | LC | — | |
| Blyth’s Pipit | — | பிளைத் நெட்டைக்காலி | Anthus godlewskii | LC | — | |
| Blyth’s Reed Warbler | — | பிளைத் நாணல் கதிர்க்குருவி | Acrocephalus dumetorum | LC | — | |
| Booted Eagle | — | பூஞ்சைப் பருந்து | Hieraaetus pennatus | LC | — | |
| Boulenger’s Keelback | දිය පොළඟා | — | Fowlea asperrima | LC | Endemic | |
| Brahminy Blindsnake | — | — | Indotyphlops braminus | LC | — | |
| Brahminy Kite | — | செம்பருந்து | Haliastur indus | LC | — | |
| Brahminy Starling | — | கருங்கொண்டை நாகணவாய் | Sturnia pagodarum | LC | — | |
| Bridled Monocle Bream | — | — | Scolopsis bilineata | LC | — | |
| Bridled Tern | — | — | Onychoprion anaethetus | LC | — | |
| Bridled Triggerfish | — | — | Sufflamen fraenatum | LC | — | |
| Bright Babul Blue | — | — | Azanus ubaldus | LC | — | |
| Bronze-Lined Spinefoot | — | — | Siganus insomnis | LC | — |
