Xangelo

Image if you will the peaceful waters of a river. Flowing gently around you as you sit in your boat and lazily drift about. As your boat drifts below some low hanging mangrove trees you notice a small caterpillar on a low hanging branch. Suddenly a jet of water shoots out of the lake, smacks said caterpillar off the branch and then a fish eats it.

Wait, what? Meet the Archerfish. A fish who has much better aim that me. It sticks it’s snout slightly above the water.. and then contracts its gills to shoot water right at insects. It can shoot this water about 2 meters and it’s very accurate till about 1.5. But that’s not even the craziest part. Birds that hunt fish tend to have special lenses over their eyes to auto-correct the refraction of light (google it, no physics lession today), this is so that they can see where the fish actually is, instead of where you think the fish is. 

Archer fish don’t have that. They learnt to correct their aim to take into account refraction. If you want to imagine just how hard that is, drop a penny into a bucket of water. Then stick your hand in where you think it is, chances are, unless you already have terrible aim and are very lucky, you’ll miss. The Archer Fish however doesn’t miss. In fact, it’s so accurate that it actually controls insect populations.

http://en.wikipedia.org/wiki/Archerfish

http://www.naturia.per.sg/buloh/verts/archer_fish.htm