n = 82
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Betta akarensis | Regan, 1910 | Betta akarensis | Osphronemidae | Akar betta |
| Betta albimarginata | Kottelat & Ng, 1994 | Betta albimarginata | Osphronemidae | |
| Betta anabantoides | Bleeker, 1851 | Betta anabatoides | Osphronemidae | Giant betta |
| Betta anabatoides | Bleeker, 1851 | Betta anabatoides | Osphronemidae | Giant betta |
| Betta antoni | Tan & Ng, 2006 | Betta antoni | Osphronemidae | |
| Betta apollon | Schindler & Schmidt, 2006 | Betta apollon | Osphronemidae | |
| Betta aurigans | Tan & Lim, 2004 | Betta aurigans | Osphronemidae | |
| Betta balunga | Herre, 1940 | Betta balunga | Osphronemidae | |
| Betta bellica | Sauvage, 1884 | Betta bellica | Osphronemidae | Slim betta |
| Betta brederi | Myers, 1935 | Betta pugnax | Osphronemidae | Penang betta |
| Betta breviobesa | Tan & Kottelat, 1998 | Betta breviobesa | Osphronemidae | |
| Betta breviobesus | Tan & Kottelat, 1998 | Betta breviobesa | Osphronemidae | |
| Betta brownorum | Witte & Schmidt, 1992 | Betta brownorum | Osphronemidae | |
| Betta burdigala | Kottelat & Ng, 1994 | Betta burdigala | Osphronemidae | |
| Betta channoides | Kottelat & Ng, 1994 | Betta channoides | Osphronemidae | |
| Betta chini | Ng, 1993 | Betta chini | Osphronemidae | |
| Betta chloropharynx | Kottelat & Ng, 1994 | Betta chloropharynx | Osphronemidae | |
| Betta climacura | Vierke, 1988 | Betta akarensis | Osphronemidae | Akar betta |
| Betta coccina | Vierke, 1979 | Betta coccina | Osphronemidae | |
| Betta compuncta | Tan & Ng, 2006 | Betta compuncta | Osphronemidae | |
| Betta cracens | Tan & Ng, 2005 | Betta cracens | Osphronemidae | |
| Betta dennisyongi | Tan, 2013 | Betta dennisyongi | Osphronemidae | |
| Betta dimidiata | Roberts, 1989 | Betta dimidiata | Osphronemidae | |
| Betta edithae | Vierke, 1984 | Betta edithae | Osphronemidae | |
| Betta enisae | Kottelat, 1995 | Betta enisae | Osphronemidae | |
| Betta falx | Tan & Kottelat, 1998 | Betta falx | Osphronemidae | |
| Betta fasciata | Regan, 1910 | Betta bellica | Osphronemidae | Slim betta |
| Betta ferox | Schindler & Schmidt, 2006 | Betta ferox | Osphronemidae | |
| Betta foerschi | Vierke, 1979 | Betta foerschi | Osphronemidae | |
| Betta fusca | Regan, 1910 | Betta fusca | Osphronemidae | Dusky betta |
| Betta gladiator | Tan & Ng, 2005 | Betta gladiator | Osphronemidae | |
| Betta hendra | Schindler & Linke, 2013 | Betta hendra | Osphronemidae | |
| Betta hipposideros | Ng & Kottelat, 1994 | Betta hipposideros | Osphronemidae | |
| Betta ibanorum | Tan & Ng, 2004 | Betta ibanorum | Osphronemidae | |
| Betta ideii | Tan & Ng, 2006 | Betta ideii | Osphronemidae | |
| Betta imbellis | Ladiges, 1975 | Betta imbellis | Osphronemidae | Crescent betta |
| Betta krataios | Tan & Ng, 2006 | Betta krataios | Osphronemidae | |
| Betta kuehnei | Schindler & Schmidt, 2008 | Betta kuehnei | Osphronemidae | |
| Betta lehi | Tan & Ng, 2005 | Betta lehi | Osphronemidae | |
| Betta livida | Ng & Kottelat, 1992 | Betta livida | Osphronemidae | |
| Betta macrophthalma | Regan, 1910 | Betta pugnax | Osphronemidae | Penang betta |
| Betta macrostoma | Regan, 1910 | Betta macrostoma | Osphronemidae | Spotfin betta |
| Betta mahachaiensis | Kowasupat, Panijpan, Ruenwongsa & Sriwattanarothai, 2012 | Betta mahachaiensis | Osphronemidae | |
| Betta mandor | Tan & Ng, 2006 | Betta mandor | Osphronemidae | |
| Betta midas | Tan, 2009 | Betta midas | Osphronemidae | |
| Betta miniopinna | Tan & Tan, 1994 | Betta miniopinna | Osphronemidae | |
| Betta nuluhon | Kamal, Tan & Ng, 2020 | Genus Species | New species | |
| Betta obscura | Tan & Ng, 2005 | Betta obscura | Osphronemidae | |
| Betta ocellata | de Beaufort, 1933 | Betta ocellata | Osphronemidae | |
| Betta omega | Tan & Ahmad, 2018 | Betta omega | Osphronemidae | |
| Betta pallida | Schindler & Schmidt, 2004 | Betta pallida | Osphronemidae | |
| Betta pallifina | Tan & Ng, 2005 | Betta pallifina | Osphronemidae | |
| Betta pardalotos | Tan, 2009 | Betta pardalotos | Osphronemidae | |
| Betta patoti | Weber & de Beaufort, 1922 | Betta patoti | Osphronemidae | |
| Betta persephone | Schaller, 1986 | Betta persephone | Osphronemidae | |
| Betta pi | Tan, 1998 | Betta pi | Osphronemidae | |
| Betta picta | (Valenciennes, 1846) | Betta picta | Osphronemidae | Spotted betta |
| Betta pinguis | Tan & Kottelat, 1998 | Betta pinguis | Osphronemidae | |
| Betta prima | Kottelat, 1994 | Betta prima | Osphronemidae | |
| Betta pugnax | (Cantor, 1849) | Betta pugnax | Osphronemidae | Penang betta |
| Betta pulchra | Tan & Tan, 1996 | Betta pulchra | Osphronemidae | |
| Betta raja | Tan & Ng, 2005 | Betta raja | Osphronemidae | |
| Betta renata | Tan, 1998 | Betta renata | Osphronemidae | |
| Betta rubra | Perugia, 1893 | Betta rubra | Osphronemidae | Toba betta |
| Betta rutilans | Witte & Kottelat, 1991 | Betta rutilans | Osphronemidae | |
| Betta schalleri | Kottelat & Ng, 1994 | Betta schalleri | Osphronemidae | |
| Betta siamorientalis | Kowasupat, Panijpan, Ruenwongsa & Jeenthong, 2012 | Betta siamorientalis | Osphronemidae | |
| Betta simorum | Tan & Ng, 1996 | Betta simorum | Osphronemidae | |
| Betta simplex | Kottelat, 1994 | Betta simplex | Osphronemidae | |
| Betta smaragdina | Ladiges, 1972 | Betta smaragdina | Osphronemidae | Blue betta |
| Betta spilotogena | Ng & Kottelat, 1994 | Betta spilotogena | Osphronemidae | |
| Betta splendens | Regan, 1910 | Betta splendens | Osphronemidae | Siamese fighting fish |
| Betta stigmosa | Tan & Ng, 2005 | Betta stigmosa | Osphronemidae | |
| Betta stiktos | Tan & Ng, 2005 | Betta stiktos | Osphronemidae | |
| Betta strohi | Schaller & Kottelat, 1989 | Betta strohi | Osphronemidae | |
| Betta taeniata | Regan, 1910 | Betta taeniata | Osphronemidae | Borneo betta |
| Betta tomi | Ng & Kottelat, 1994 | Betta tomi | Osphronemidae | |
| Betta trifasciata | Bleeker, 1850 | Betta picta | Osphronemidae | Spotted betta |
| Betta tussyae | Schaller, 1985 | Betta tussyae | Osphronemidae | |
| Betta uberis | Tan & Ng, 2006 | Betta uberis | Osphronemidae | |
| Betta unimaculata | (Popta, 1905) | Betta unimaculata | Osphronemidae | Howong betta |
| Betta waseri | Krummenacher, 1986 | Betta waseri | Osphronemidae |