They're harmless. I had the same thing when my tank was new. They will probably go away on their own in time. They are in the HHFAQ section but I can't remember what they're called.
Tiny little jelly fish?
Staurocladia Oahuensis I think,I'd send you a link with a picture but this message board thing is all new to me and I dont know how to work it yet.
Your little picture accually looked familiar,YOU are a great artist.