After a 16 second high-risk, non-invasive surgery involving what appears to be a t-shirt tag and a piece of cork, we can report that this goldfish is swimming normally.
On May 28, Redditor leability uploaded this image of a quick fix for a goldfish who had trouble swimming upright.
As a few Redditors pointed out in the post, the fish is likely suffering from an infected swim bladder -- the result of the high-protein diet owners typically feed their fish.
A more permanent fix for the ailment is to feed your goldfish skinned, chopped green peas. The nutrients in the peas and the vegetable's density should right your pet's diet in a few days.