This month's American Scientist has a neat, short article about the Archer Fish, a species of fish that gets its food (flying or crawling bugs) by spitting watter at them and knocking them down. This appears to be done by visually tracking their prey, even across the refractive air-water boundary.

As cool as this skill is, their ability to learn it is even cooler. They appear to be able to learn certain ballistic techniques just by watching other archer fish shoot at the same kind of targets. The article suggests possible implications and further research for cognitive neuroscience and robotics, but doesn't go into them in as much detail as i'd like.

There article also has what appears to be the canonical laboratory image of an archer fish in action, which i find starkly beautiful.