Last updated 30.04.2013
This list only covers officially-described species following Tan and Ng (2005) plus subsequent modifications.

© Haji Badaruddin
Betta akarensis group:
B. akarensis Regan, 1910
B. aurigans Tan & Lim, 2004
B. balunga Herre, 1940
B. chini Ng, 1993
B. pinguis Tan & Kottelat, 1998
B. ibanorum Tan & Ng, 2004
B. obscura Tan & Ng, 2005
B. antoni Tan & Ng, 2006

© Haji Badaruddin
Betta albimarginata group:
B. albimarginata Kottelat & Ng, 1994
B. channoides Kottelat & Ng, 1994

© Michael Lo
Betta anabatoides group:
B. anabatoides Bleeker, 1851
B. midas Tan, 2009

© Zhou Hang
Betta bellica group:
B. bellica Sauvage, 1884
B. simorum Tan & Ng, 1996

© Haji Badaruddin
Betta coccina group:
B. coccina Vierke, 1979
B. tussyae Schaller, 1985
B. persephone Schaller, 1986
B. rutilans Witte & Kottelat, 1991
B. brownorum Witte & Schimdt, 1992
B. livida Ng & Kottelat, 1992
B. miniopinna Tan & Tan, 1994
B. burdigala Kottelat & Ng, 1994
B. uberis Tan & Ng, 2006
B. hendra Schindler & Linke, 2013

© Haji Badaruddin
Betta dimidiata group:
B. dimidiata Roberts, 1989
B. krataios Tan & Ng, 2006

© Zhou Hang
Betta edithae group:
B. edithae Vierke, 1984

© Gustav Eek
Betta foerschi group:
B. foerschi Vierke, 1979
B. strohi Schaller & Kottelat, 1989
B. mandor Tan & Ng, 2006

© Haji Badaruddin
Betta rubra group:
B. rubra Perugia, 1893
B. dennisyongi Tan, 2013

© Nonn Panitvong/Siamensis.org
Betta picta group:
B. picta (Valenciennes, 1846)
B. taeniata Regan, 1910
B. simplex Kottelat, 1994
B. pallida Schindler & Schmidt, 2004
B. falx Tan & Kottelat, 1998

© Haji Badaruddin
Betta pugnax group:
B. pugnax (Cantor, 1849)
B. fusca Regan, 1910
B. schalleri Kottelat & Ng, 1994
B. prima Kottelat, 1994
B. enisae Kottelat, 1995
B. pulchra Tan & Tan, 1996
B. breviobesus Tan & Kottelat, 1998
B. lehi Tan & Ng, 2005
B. stigmosa Tan & Ng, 2005
B. cracens Tan & Ng, 2005
B. raja Tan & Ng, 2005
B. apollon Schindler & Schmidt, 2006
B. ferox Schindler & Schmidt, 2006
B. kuehnei Schindler & Schmidt, 2009

© Zhou Hang
Betta splendens group:
B. splendens Regan, 1910
B. smaragdina Ladiges, 1972
B. imbellis Ladiges, 1975
B. stiktos Tan & Ng, 2005
B. mahachaiensis Kowasupat, Panijpan, Ruenwongsa & Sriwattanarothai, 2012
B. siamorientalis Kowasupat, Panijpan, Ruenwongsa & Jeenthong, 2012

© Haji Badaruddin
Betta unimaculata group:
B. unimaculata Popta, 1905
B. macrostoma Regan, 1910
B. patoti Weber & de Beaufort, 1922
B. ocellata de Beaufort, 1933
B. gladiator Tan & Ng, 2005
B. ideii Tan & Ng, 2006
B. pallifina Schindler & Schmidt, 2004
B. compuncta Tan & Ng, 2006

© Zhou Hang
Betta waseri group:
B. waseri Krummenacher, 1986
B. hipposideros Ng & Kottelat, 1994
B. spilotogena Ng & Kottelat, 1994
B. chloropharynx Kottelat & Ng, 1994
B. renata Tan, 1998
B. pi Tan, 1998
B. tomi Ng & Kottelat, 1994
B. pardalotos Tan, 2009
Laetacara curviceps – Dwarf Flag Cichlid (Acara curviceps, Aequidens curviceps)
The Laetacara curviceps will nibble on soft leaves of live plants as I have observed.
21st Jan 2019
Tetraodon miurus (Congo Puffer)
I own one of these guys and they are truly awesome. His name is Quagmire (given the squared-out jaw.) If you’re not keen on the idea of the fish bei...
5th Nov 2018
Poecilia reticulata – Guppy (Lebistes poecilioides, Girardinus guppii )
You recommend keeping this species with Rasboras, Tetras and Corydoras? Guppies do best in very high pH, while Tetras, Corydoras and Rasboras do best ...
1st Nov 2018
Aphyosemion striatum – Red-striped Killifish (Haplochilus striatus, Epiplatys striatus)
The default photo isn't indicative of how most populations of A. striatum look like in reality. That is a very washed out looking male in my opinion. ...
13th Oct 2018
Nothobranchius rachovii (Bluefin Nothobranch)
The image shown for "Captive-bred, adult male individual of the 'Beira 98' collection." is incorrect. That isn't a 'Beira 98' male. The picture is s...
13th Oct 2018