Leighton Naylor is an English man. He has a pet fish. The fish is called Einstein, because why not? It's a pet. If I had a dog, it would be called Thorin, or Erwin, or something.

Einstein has a dysfunctional buoyancy bladder (mostly known as swim bladder) which is the organ that allows fish to go up and down in the water. It's a tiny vessel surrounded by muscles: muscles tighten, it gets smaller and the fish sinks; muscles relax, it gets larger and the fish floats. Like a submarine, but tiny and adorable.

So Einstein was ill. He would sink to the bottom of the tank, and that's sad. A fish that can't swim? Oh, the humiliation!
Sometimes these disorders are caused by bad nutrition, but apparently that wasn't the cause.

That's when Leighton made a life vest for Einstein:

Your Daily Bit of Aaaw: Man Makes Life Vest for Pet Fish.



Those are empty plastic tubes, and they help Einstein float.

Your Daily Bit of Aaaw: Man Makes Life Vest for Pet Fish.



Einstein's motion is still very constrained, requiring manual feeding and all. But hey, he can swim now!

And that is how science made a swimless fish swim again. Thank you, science!

Your Daily Bit of Aaaw: Man Makes Life Vest for Pet Fish.

*Dante Sheperd made this nice sign.