Goldfish of ~4 years is suddenly sick/dying, please help!

PearlScale Goldfish might be ill (NSFW because sick fish)

Very sick goldfish, please help

Sick fish please help

My pond baby "big now" is sick I think and I dont know what to

Large red spots on bottom of ranchu mouth/head?

Sick fish! Please help.

Is my fish sick?

my goldfish is sick please help!!!

Is he chill or sick?

Goldfish seems sick, very worried

Sick? Off balance goldfish at bottom.