Firstly, what was your inspiration for this creature, Tribble? Because while it feels like something that might exist in mythology, I can't place it.
Secondly, for a Good creature, isn't this thing creepy as hell? :) They're so alien, I can imagine what was intended to be a peaceful encounter with one going horribly wrong.
DM: "You remove your armor and slip into the dark water. You see a shimmering figure swimming in front of you, its bones clearly visible through its filmy skin, its eyeless face gazing at you intently, its silvery hair billowing about it like a..."
Other Players: "AAAAAHHHHH!"
DM: "Um, it says, 'Silly lost travelers, allow me to lead you to the...'"
Player: "KILL IT!"