Scrupocellaria- lophophores at work

Here is just a visual of how the lophophore works as a feeding zooid. Note how individual tentacles flick possible food particles into its mouth besides the entire tentacular crown retracting.  A lot is going on in this video, in the last  five seconds (towards the middle ) there is this structure  moving pretty fast from side to side, I think it might be the vibracula, any thoughts?

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