i think it is called
''rotten fin'' , dont get worrried you can ask questions on Google, if it is rotten fin, i think you can pick up you can pick up some medicine or some thing like that at your local pet store, you can ask staff there what you want to know about your bettas condition.
A white fuzzy spot on a fish could be caused by a fungal infection.
The fuzzy white things are fungus, they are eating the dead tissue of the fish.
Your fish could have something called "ick". It is a disease and can be easily treated with over the counter medications. This only from what you are describing; ick forms on the fins as a milky white ribbon, so to say. It could just be the fish's natural color, but I haven't ever really seen white on betta fish. If it is ick and you do not treat it, your fish will could die.
Yes.
They can but it's best they don't because can get a common fish disease.
Bundle- That way, you could introduce them as "Betta Bundle".
The signs of a healthy Betta fish are bright colors, no torn fins, good appetite, very active and it occasionally sleeping. Signs of a un-healthy Betta are torn fins, loss of appetite, losing color,less active very sleepy, and sometimes white eyes. Things that cause this are disease from new fish or dirty tanks, crowded tanks, or other fish.
The fish has a disease which may well be the disease known as 'dropsey'. The fish is in urgent need of medication/treatment which may or may not help it to survive.
The Betta fish may have a fungus disease if there are small black spots on the back. It could also just be aging spots that some Betta fish get. You can purchase BettaFix at any pet store and add it to water to see if that helps.
No betta fish are carnivores.
other Betta fish and the bigger fish.
Betta fish do not eat fish.