Betta smaragdina tropical fish
Keeping Betta smaragdina from an Aquarist View
Not critical, smaragdina is very tolerant of water chemistry and thrives in almost any type of water as long as it is clean and well filtered. They should be kept at mid 70s to low 80s F.
Males are more intensely colored and might have longer fins while the females will be a browner in color however females should display an ovipositor or egg tube.
Smaragdina is a surface bubblenester however the male may make a nest under objects on the surface of the water. Males normally initiate spawning and entice females to the nest for spawning.