Is this a Coral Polyp?

[tylo92]

This has popped out of my live rock the last couple days. Originally I thought it was a form of algae but saw it actively moving today. It would take one arm at a time and put it in its mouth. It seems very methodical. I’ve searched all day and but haven’t seemed to find an exact match. The arm tips are red and are very fine and branch like.
I appreciate the help and hope I can start answering questions soon instead of asking them.
Here is a link to Imgur since the video would not upload :

 

[blaxsun]

Can't really tell from the images, but it sounds neat.

 

[bradleym]

The way it moves I'd be tempted to say it's the mouth of a sea cucumber.

 

[dedragon]

hard to tell just make sure it isnt a pest anemone or something

 

[bradleym]

hard to tell just make sure it isnt a pest anemone or something

It's hard to see details, but it looks like the arms/tentacles are branched at the end, so if it's an anemone it's a very cool looking one!

 

[EeyoreIsMySpiritAnimal]

The way it moves I'd be tempted to say it's the mouth of a sea cucumber.

Agree.
Very cool!

 

[tylo92]

The way it moves I'd be tempted to say it's the mouth of a sea cucumber.

That helped me narrow down my search! I never realized they can move each tentacle independently of each other but it is pretty mesmerizing. I found one article from 2008 that has a matching picture and calls it a rock-dwelling Dendrochirote Holothuroid / sea cucumber on wetwebmedia. I wasn't able to find much more information. If anyone has anymore knowledge to add, let me know. I would love to try to keep this alive.