It will think that there is another fish really there and it will fight at it until you take the mirror away from it or it dies.
If, when other fish are in the same environment as piranhas, the other fish are eaten, then piranhas are a type of fish that eats other fish. your welcome
It is generally not safe to put betta fish with other fish in the same tank, as bettas are known to be aggressive and may attack other fish. It is best to keep bettas in a tank by themselves to prevent any harm to other fish.
You can't put tropical fish with each other or they will eat eachother
You put minnows or other fish well im not sure
Beta fish do NOT like other fish, they may try to kill the other fish or get seriously injured by the other fish.So probably not.
like most living things walking fish have character. i used to have two of them one would run away from the fish and the other nearly killed itself trying to eat it. the one i have now doesn't pay atention to the fish. so its up to you if you want to put a fish in with it or not :)
You can put any other tropical fish that does not have long flowing fins or tail and is not aggresive.
Fighting fish are territorial and can be very aggressive, they will kill other fish if you put them in the same tank.
Possibly,but it would be best if you put her in a separate tank,like a 10 gal.because the other fish might eat the baby fish if you let her stay in there with your other fish.
no they will fight
goldfish mainly