Males build a nest of bubbles at the surface of the water and females display horizontal lines the length of their bodies.
he starts making a bubble nest
once they are full-grown.
when it's full grown
There are no published studies regarding betta fish memory at this point in time
Betta are social fish. There is nothing wrong.
sleep
Yes a betta fish will grow back lost scales with time and clean water.
They might mate on there own give them time but don't leave them together. One might kill the other and maybe the mother might start to fight back ,but in that case don't leave them together!
a long time
Star fish do not mate .
Don't worry about it. He will die when his time is up. Why rush and try to anticipate bad things.
No, you should never keep a male and female betta fish together for long time periods. They should only be put in the same tank for breeding purposes and then separated after.
no
That depends on the Betta fish. If it's just a bit of a nuisance, Some time in it a separate container could stop this problem. But if your betta is so aggressive, so hostile, it seriously injures the other fish in the community, than you have no choice but to buy an Breeder Box and keep the betta in there. Or buy a separate tank for the betta entirely. A Fightn' Fish Fact: Female Betta fish can be aggressive too. It's just less likely.
Bettas can die at any time.