Blind Fish

Looking for some input here.

All of a sudden, a few days ago, I noticed one fish does not seem to see. He doesn't interact with any of the other fish (or me). He either doesn't notice or doesn't care that his food is falling from the sky. He won't eat. There was even a piece of food floating right next to him that he was completely unfazed by.

I have put my finger towards the glass and get no reaction whatsoever. Most of the fish will swim towards my hand outside the tank. He does react if I touch the glass; light touch, not tapping.

He's not swimming around all that much, but when he does he seems to swim fine and doesn't crash into anything. He can dart when startled, but still seems to avoid obstacles. I'm not sure if that means he can see or what else he can sense in the tank.

He's not moving a lot and seems to hang out in the largest spaces between decorations. Although, he doesn't swim at the top quarter to half of the tank which has no decorations in it. Most of them only come up about halfway from the bottom. Avoiding filter currents maybe?

Anyway, not sure if this is something I should be concerned about or what. The fish is glow tetra in a fully cycled tank. Zero ammonia or nitrites. Nitrates are under 25. No problems with any other fish in the tank. Any thoughts would be appreciated.

 

Does it look like his eyes are cloudy milky white? Maybe he got diamond eye? Just check and take a picture of his eyes

 

Does it look like his eyes are cloudy milky white? Maybe he got diamond eye? Just check and take a picture of his eyes

Eyes are bright orange. Look like they always have.

 

K how Long have you had him he might just be getting old

 

He's only about 3 months old.

K how Long have you had him he might just be getting old

 

Ok set up a permanent home for him. So nothing will move and he will know where everything is stick a bamboo skewer in the gravel then take a plastic water bottle ring and put that around the skewer and set up a signal so he knows he’s being fed and put the food in the feeding ring

 

Having had blind fish in the past, they certainly don't need their eye sight to get around. In a lot of cases, they come from turbid rivers in the wild which results in low vision and as a result, they very good at smelling and using their lateral line as a compass. No need to do anything extra, mayve at most feed a little more so the blind fish can still get its fair share of food.