Gray nisps dwell in deeper water, in caves on the ocean floor or hollows at the bottom of sizeable lakes. They are isolative and territorial. They are also smart enough to realize how dim they are, and this realization makes them irritable and unpredictable. They have a keen sense of smell, and immediately investigate creatures that stray too close to their lair. Their curiosity usually takes the form of pulling apart intruders to see how they are built. Though technically sentient, nisps do not reason the way most creatures do. They have no concept of love, duty, or hatred, though they do seem capable of nearly insatiable curiosity and malice.