Can a betta fish go blind?

Yes, betta fish can go blind. There are a few different causes of blindness in betta fish, including:

* Eye injuries: Betta fish can injure their eyes by bumping into objects in their tank, or by being attacked by other fish.

* Bacterial infections: Bacterial infections of the eye can cause inflammation and scarring, which can lead to blindness.

* Viral infections: Viral infections, such as lymphocystis, can also cause blindness in betta fish.

* Nutritional deficiencies: A lack of certain nutrients, such as vitamin A, can lead to vision problems in betta fish.

* Old age: As betta fish age, they may develop cataracts, which are a clouding of the lens of the eye. Cataracts can lead to partial or complete blindness.

If you think your betta fish may be going blind, it's important to take them to a veterinarian for diagnosis and treatment. There are some cases of blindness that can be treated, but others may be permanent.