Bettas can be kept alone permanently but they should be kept in a proper container of at least 5 Gallons nominal capacity with a filter and plants and light.
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.
A betta fish is anywhere from 1 to 2 inches.
Because, if they are in a small cage the Betta will stop growing. But, the organs will keep growing and the fish will die a long and painful death.
Betta fish can be from 2 to 4 inches long when fully grown.
Betta fish grow to be an average of 2 inches from head to the beginning of the tail.
Betta fish can survive out of water for a short period of time, typically around 15-30 minutes. It is important to keep them in water to ensure their health and well-being.
You can place a mirror in front of it and it will fight as though it was another betta. However if you keep the mirror in for too long your betta will get stressed out and die, so best not to do that.
it depends on the beta,but if you intend on doing this make sure none of the other fish have long fins,or the next day you could have a tailless fish!
a long time
To the best of my knowledge no one keep those kind of records. Bettas are mature at 12 months, past their prime at 2 years old and ancient fish at 4 if they live that long. I have a Betta fish that is now over 5 years old because I change the water once a week with 2 gallons of purified water and I add about 20 drops of Splendid Betta Complete Water Conditioner to it. Using the water conditioner is a MUST to ensure that your Betta fish will live a very long life. I also feed my Betta fish 4 pellets of Hikari Betta Bio Gold once a day in the morning and 1 pellet at around 7pm.
Betta fish do not enjoy currents that come from filters. You could put in a filter but I would recommend not to. Also, Heaters are unnecessary as long as you keep the water 70-80 degrees.
Depends what fish you have, if the fish are colourful and have long fins then it'll probably bite it to death, every betta is different.