i have a Bette fish,  Betta is a popular fish in the aquarium trade, and it is so beautiful. 
And how does it looks like?  I know that Betta is a large genus of small, often colorful, freshwater fishes.
they are usually red. Males are more beautiful then females. And you can have only one male in aquarium. 
they must be very territorial.It is great for them that the are anabandtoids, that is that they can breath atmospheric air too.
That is interesting! The fish can be found in standing waters of canals, rice paddies and floodplains.
And they can thrive in low-oxygen water that would kill most other fish, such as rice paddles, drainage ditches and large puddles.
Male spread their fins and twist their bodies in a dance if interested in a female. If the female is interested she will darken in color as a response.
That sounds beautiful, I know they can also vary a lot in size from under 2.50 cm to 12.5 cm.