I've kept the fish in my tank when I had one. Fascinating, but not the superfish the article makes of them. They will shoot water at any dark spot they will see on the aquarium top.
As for their abilities, they came via evolution, those fish that could shoot had an advantage and they passed it on.
But to say that the archerfish disproves evolution? Nonsense! This article has no depth to it, no way of explaining its premise, and no proof offered other than calling it some kind of miracle.
Oh come on now. I've got an uncle who can spit six or more feet without missing and he hadn't evolved at all. Good old Mel.