Yes it can
No, Betta fish are aggressive toward any other fish they see. They cannot mate.
The betta fish will see the mirror and then will be curious about it, because the mirror reflects the betta fish and they might think that it is another fish, so the fish will act differently.
Betta fish get in fights with fish with colorful fins and bodies. If your betta gets in a fight while your away,the weaker fish may die. But if you see your betta fight with another fish you should try to split the two fish apart [or all the fish that are fighting].
no... they eat blood worms[dried] or small baby ghost shrimp
Betta fish don't even think about goldfish they need 10 gallons each. If your bowl is bigger than 1 gallon a betta will do fine. Below 1 gallon get a ghost shrimp or snail
No betta fish are carnivores.
other Betta fish and the bigger fish.
Betta fish do not eat fish.
Well, if you love your Betta fish, then it should live by itself. But if you add another Betta to your current Betta fish's tank, then they will start a fight because Betta Fish are Siamese fighting fish and if one Betta is in contact of another Betta, the possible reason would be a fight between them two.
A betta is a fish of the species Betta, especially Betta splendens, commonly known as the Siamese fighting fish.
If the fish is still getting used to it's surroundings, it might not eat. This is normal. Usually if betta fish are comfortable, they will eat as soon as they smell or see the food.