Look, one of our old mods wrote an index entry about them.
http/www.fishforums.net/index.php?/topic/115947-betta-falx/
For more information about a variety of interesting betta species, listen to the podcast with Coryologist and Mark Denaro. It's surprising how many betta species there are.
http/www.fishforums.net/index.php?/topic/308000-coryolgists-interview-with-mark-denaro/
If you live in the US, Mark Denaro of Anubias Design often imports various kinds of wild bettas and other fish. A link to his site is here:
http/www.anubiasdesign.com/index.php
http/www.fishforums.net/index.php?/topic/115947-betta-falx/
For more information about a variety of interesting betta species, listen to the podcast with Coryologist and Mark Denaro. It's surprising how many betta species there are.
http/www.fishforums.net/index.php?/topic/308000-coryolgists-interview-with-mark-denaro/
If you live in the US, Mark Denaro of Anubias Design often imports various kinds of wild bettas and other fish. A link to his site is here:
http/www.anubiasdesign.com/index.php