Description: English: Male specimen of Betta smaragdina. This species has several English vernacular names, for example Emerald Green Betta, Blue Betta, and Mekong Fighting Fish. It is closely related to the Siamese Fighting Fish (Betta splendens), but not as aggressive. Date: 31 December 2006. Source: Own work. Author: R.J. Blach.
Description: English: Betta smaragdina pair. This species has several English vernacular names, for example Emerald Green Betta, Blue Betta, and Mekong Fighting Fish. It is closely related to the Siamese Fighting Fish (Betta splendens), but not as aggressive. Date: 31 December 2006. Source: Own work. Author: --Acapella 09:31, 31 December 2006 (UTC).