Watch them go :D You can toggle a focus lens by clicking on a sluggly, but you can't switch to another one without clicking X first that's all :)
This is a sluggly, a fictional slug-like creature. They can be found in the depths of lakes and ponds, usually in a deep and dark portion of it. They thrive by getting together in groups because that's how they feed, when they rub themselves together, it generates little sparks of energy, which is what the sluggly' feed on. If there are not enough of them together, they would start to lose their shade and die, so it's good to keep them at a minimum population of 70 - 100.