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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.
What else can I help you with?
Will betta fish eat crackers?
I believe you mean Betta fish. No, it should be fine. You can treat you Betta fish by giving them bloodworms!
What do ocean Betta fish eat?
There is no such thing as an "Ocean Betta".
Do Betta fish have to be fed twice a day?
No, once per day is fine for Betta's.
Why does my female Betta fish chase the male Betta around?
The Betta fish want to kill eachother. That's what all Betta fish want to do, that's a natural thing.
Can tropical fish live with betta fish?
Yes they would be fine (if they are plants that are ment to live underwater) for the betta splenden aka Siamese fighter fish (assuming that is the betta you are refering to) as it is a tropical fish
Are some betta fish white?
Yes.
Can you put a betta fish in a three gallon tank?
yes of course! my betta is in a 2.5g and is perfectly fine
Is it safe to put bamboo in with your betta fish?
Some betta kits come with bamboo; it's completely fine
Can a betta fish survive in a bowl that had a goldfish in it for a day?
It should be fine.
Can betta fish and glow in the dark fish be in the same tank?
Female Betta fish can be fairly good community style fish and should be fine. Male Bettas would massacre the community.
Betta fish age?
Yes because they are a living thing.
What Happens If you put a male Betta in with other fishes?
it depends some fish can be less aggressive than others i had a male Betta that lived fine for years with gold fish
