The purple dots in that pic look similar to this possibly
http://www.wallpaperfishtalk.com/wallpapers/marine/000051.jpg
Maybe they are just retracted and will extend eventually.Like once they are well fedYeah... but the bubbles? I gotta tell yah... dude, I'm stumped! lol
Jacques, how many different anemone's do you have in your tank? I'm just concerned that the reason why this one (if it is an anemone) is not extending its tentacles is due to chemical warfare being waged between the different anemone's.