The page on nideans has been uploaded. Some highlights:
Nideans are a subterranean race of the mandean species. Most people have no idea they exist. They and other life forms in their habitat are often bioluminescent. They tend to be shorter than humans; some think they are mandean children. Their skin is often pale, even translucent so that internal organs are visible. Nideans wear nothing. Nideans exclusively live in deep underground rivers and more commonly lakes.
Nideans don’t have any formal schooling. Therefore, wizards don’t exist, only sorcerers. Nideans never fight anything, just swimming away. Nidean populations are always small due to habitat. There’s never been a nidean in a joint settlement unless it was captured.