The researchers draw parallels between the archerfish's spitting skills - timing the water jet to hit a mark just so - and the way humans handle weapons. "One of the last strongholds of human uniqueness," Schuster says, "is our ability to powerfully throw stones or spears at distant targets."
One line of thought, according to Schuster, is that precision throwing translated to more neural activity and bigger brains. "With the many neurons around, they could be used for other tasks apart from applying them for powerful throws," he says. "It is remarkable that the same line of reasoning could also be applied to archerfish."
There's no doubt that these fish have mastered the physics of squirting water. (They also have to calculate where a target is when looking up from below, which isn't an easy task thanks to the way water bends light.) As Aatish Bhatia explains at Wired, an "archerfish hunts with a working knowledge of motion, gravity, optics, and fluid dynamics" - a set of sharpshooting skills any human superspy would envy.