I volunteered to look after a batch of blind and partially blind fish.
After nearly 20 months only three are left.
One has total visually capacity now.
One is blind in one eye.
The other is totally blind.
It amazes me how it survived.
It more amazing how it detects me.
The moment I sit next to the tank it comes near to the side my chair is kept.
The blind fish knows I am there.
I do not touch anything.
Probably it detects my foot steps and pulling the chair (gently).
I do not feed that tank (to confuse the blind fish in a way) first as a routine but feed the fish in the main big tank.
Moment I start putting the pellets that sink to the bottom, the two clown fish make a mess of the bottom sediment, and then the blind fish hits at the bottom or the floor in a random fashion and finds its food.
That's how it survived.
I believe the other fish, especially the clown fish (scavenger) gives a subsonic message to the blind fish.
They are all in one community.