YouTube user synirr had one goldfish who just couldn't maintain her buoyancy. So she outfitted the fish with a special buoyant sling that let Goldie swim around her tank, paddling about with her front fins.

However, even with the sling, competition for food was still an issue, and so synirr would feed her sling-bound fish by hand:

Some of the commenters over at Mental Floss have speculated that the fish's woes might be caused by a bladder problem, and that she might need some more green veggies in her diet.

[via mental_floss]