Because my Bettas are mixed from Vietnamese, Thai, and Malaysian champion blood-lines.
Bettas has the power and long sharp teeth, quickness, endurance, and beautiful hard metal scales.
Betta has the aggressiveness of a crazy dog. It is aggressive to each other and some other kinds of fish. An adult male Betta is not afraid to attack a fish much larger than its size. Some male Bettas would fight with the other until dead.
Betta is very territorial. In the wild or big bond, each male Betta occupies and claims ownership of an area. It will attack any other fish that enters its own territory.
Although male Betta is very aggressive, it will not eat its own offspring during the spawning and nurturing periods. It will do its best to protect and take care of the offspring.
Adult male Bettas have to fight with each other for territory and female Betta. The winner male Betta will own the territory and female Betta to mate with.
If the water temperature increases significantly in a short period of time, the stripes do appear on some Bettas. Female Betta also has stripes on her body during the mating period.
If you have a chance to observe two male Bettas in a fight, you will see that they are beautiful, aggressive, courageous, and powerful.
Some people keep dog as pet, and I do keep Betta as my most favorite pet.