Filter Feeder of some sort

[Jawbone]

I have this small video of this weird little filter feeder. It lives on a piece of rock and if you watch the video it actually has two open mouths right next to each other, You can only see one clearly in the video if you look to the right of the mouth opening and closing you will notice the other. Now this is just an odd looking duck here. It always just sits there mouth gaping open all the time and ever minute or so it will close and reopen the mouth as in the video.
I also noticed when I move the light I get a defensive reation of complete retraction for a couple of seconds.

Any ID help would be appreciated. It wont change my life any but it would be kinda neat to know as I have some freinds that also have a similar creature in their tank.

Its a pretty large mpeg for dialup but you be the judge.
MPEG move of the open mouth rock dweller 2.4 Megabytes or so

 

[Jawbone]

Oh by the way there is about 10 seconds of nothing happening before it actually moves but you can tell the video is playing by all those little streaks of white wich are pods that are darting around... This is my refugium and its getting overpopulated with pods.

 

[Manofathousandpolyps]

Id have to guess and say its some type of tunicate.

 

[Wormy]

I agree with Manofathousandpolyps on this one. Looks exactly like some kind of tunicate (sea squirt).

 

[Jawbone]

Thanks. I assume no harm will come from these as I have found more really small ones on other rocks