Picori. The little people who help out humans with things. ...Or at least they're suppose to, anyway. Only children can see them, so if they're here, that may be why nobody's noticed that's what the "coral" really is.

[Vaati looks mildly irritated at this. Really, he'd have though that at least in his dreams that he wouldn't have to explain things, especially not his original species. Seriously, that of all things should be common knowledge.]