"Not here," Lance said simply but obviously, still smiling. Frankly, hearing that the Outside didn't have these sorts of beings was a shock to most of the children who were born there. The redhead continued on along the path, but kept talking over his shoulder. "The parts of their body that correspond to organs are crystalline in nature--ever seen a crystal with a lot of internal fractures but remains structurally sound? Bio-electricity runs along those fractures and is transmitted between organs through salt deposits."

He took a breath, glancing back to make sure Sefton was following. "That's why water is poisonous to beings like Ptera--it erodes and dissolves the basis for which their physiology exists."