Although amphibious air dwellers, the kuo-toa still largely behave as aquatic creatures. Thus, much of what they do on land is a bizarre approximation of life under the water. They communicate as much through gesture as speech. They have difficulty standing still and are prone to quick, darting movements. They pace constantly, walking in circles around creatures talking to them. A kuo-toa leader speaking to a group wanders aimlessly while the crowd follows like a school of fish.
Since the kuo-toa are fish-like, they lack eyelids. This isn't only unnerving in conversation (a kuo-toa never blinks), but it also means that kuo-toa all look the same sleeping as awake. Virtually all kuo-toa sleepwalk, making things even more confusing. Due to their sensitive eyes, they recoil from bright light.