As Oyushi scans the cavern with her flashlight, she sees a couple of thin, pale tentacles rise up from the pool she'd just came from and wave to her.  One signalling her back, but the other waving her good-bye.<br/><br/>When the human explored it, she finds the next pool is a bit cooler.  Apparently, whatever heats the first one doesn't run in a way to heat anything else.