ID unknown hitchhiker (coral? pest?)

[c_scherer123]

Originally Posted by Myka

Sorry, I now see you answered my question in your first post, I just didn't read it all...

Not an anemone then...but I'm not totally sold on it being a sponge or tunicate either. Try sending your pics to Wet Web Media. http://www.wetwebmedia.com/ click on "Ask WWM". They are quick at replying.

Out of curiosity I emailed them, they believe it to be either:
Eudistoma sp. Heron Island, Capricorn Group, Queensland, Australia.
http://www.wetwebmedia.com/AscidianPIX/Ascidians3.htm

or possibly
Distaplia occidentalis
http://emeralddiving.com/id_ascidians.html

It could be either, but I can't seem to get a good enough look at the one in the tank as it is at a funny angle and it hidden behind mushrooms.