Fish Disease possible Lymphocystis

[scon2799]

I’ve noticed this growth about a few months ago. I have a photo of how it looked at the end of November and now. It won’t stop growing I’m worried that if it does pop it will cause an issue with pressure causing my fish to pass. Is this lymphocystis, a tumor? I’m unsure what I should do to make it better. He acting completely normally. Eat swims around like nothing going on, but at this point the growth is blocking sight out of one of the eyes.

 

[Colin_T]

Looks like a tumour.

Lymphocystis is white and tends to grow on the edge of the fins and tail.

With tumours you leave it until the fish has trouble eating or swimming, then euthanise he fish.