A goldfish suffering from swim bladder disease has been given a new lease on life by an aquarium worker.
Derek, a 20-year-old in San Antonio, said the fish had permanent swim bladder disease, caused by bacteria or parasites, and was stuck at the bottom of its tank.
The disease affects a goldfish's floatation stability, meaning it loses its buoyancy and floats to the top of the tank, leans on one side or swims upside down.
Derek told BuzzFeed he decided to create a "one-of-a-kind wheelchair".