EEwwww That is the nasties Lump i ever seen on a fish!! that thing must cover it's eyes.....
I have a 25 inch RTC catfish almost for 2years, The largest one i had for 3years i had, it was 32inches, It die from fungis from switch it to my pond to my tank will doing a complete water change. Sadly it made me felt like i want to cry.... I still Miss my Baby Blue...)
My best is an 18" mirror carp and a 14" tench, but in the tropical depart ment is an 14"silver arow, and an 11" jag, oh and a 12" 4line pim, not much YET still time to grow.