Radiation Slime

It's unknown if rad slimes, sometimes called 'raddies,' came to be from external radiation sources or from something naturally occurring within the Far, Far Range. Regardless, rad slimes emit such a potent aura of radiation they glow in the dark. As you are exploring the islands when you stumble across a weird Slime. This slime is bigger than a normal one. You suck it up into your Vac tube, and upon making it back to your ranch you shoot this slime into a Slime Pen.