Archer Fish Shooting Prey

What do you know about how Archcer Fish are hunting their prey? 

Archer Fish are shooting down the prey from outside the water by squirting water jets to it. This jet can be up to five metres long, but what is interesting is this jet is squirted with a huge speed so the insect can be killed only by this jet power.  This thing seems to be amazing and easily but, they are encountering an obstacle. 

From water, Archer present two choices: the 'target' which is rewarded and 'distractor' which is not.

When taking aim, the archerfish takes refraction into account ( the way light bends as it enters water). It is able to correct its aim to anticipate a prey's true position, rather than the distracted one from underwater.

So, I think that the fish are smarter than most people realize because they are calculating the angle of their jet with the help of the refraction of the light.
The Archer Fish is considered as the one of the deadliest way to hunt their prey.