Around a year and a half ago I purchased a green spotted puffer, at the time of purchase he was around an inch long and doing generally well. Within that time frame however, he has unfortunately developed scoliosis. This has me asking many questions and I'm hoping someone can help me out! As of today he is anywhere from 1.5-2 years old, yet remains at his 1 inch size due to his deformity. Not much is said online about scoliosis in fish, but it does say it impairs their growth significantly. Does this mean he is completely done growing? Or will his growth just be extremely slow? Since he has consistently remained at a 1 inch size this also brings into consideration tank size. Will this fish need a standard 30 gallon tank as recommended? Or is something smaller acceptable seeing he is not growing? Lastly I want to know any opinions about the "moral" factor. Is this fish in pain? Does it need to be euthanized? Currently he eats just fine, the only thing that concerns me about his behavior is that he will quickly swim up and down the walls of my tank for hours, this could be for a number of reasons however. Any information I will gladly supply just ask! All input is welcome!