Blind crosshatch trigger.

[daniella3d]

Check if he has flukes in his eyes. You could put him in quarantine and use Paraguard to cure his eyes if he has flukes. Mine had eye flukes when I got it and a huge pop eye, and after treating with Paraguar for 3 weeks the popeye healed and the flukes were gone.

He still does not have 100% vision I can guess but he see well enough to catch very small food in the water like fish roe.

It is worth a try.