Betta fish in natural environment,this doesn't mean betta fish should be in small tanks

Betta fish in natural environment,this doesn't mean betta fish should be in small tanks
*Betta fish have evolved relay good to suit its habitat.
*Most of the bettas in natural environment are not colorful.
*They are resistant to fungal and infections.
*Female betta fish can breed ever 16~18 days
*They have a lifespan of 2years approx