Mystery feeder?

[Backer]

I recently noticed a few spot at the base of my rocks that appear to be some sort of feeding tentacle. I noticed them after a recent add of a zoa frag, I dipped the frag In revive before adding. It may be nothing but just wondering if anybody has any ideas what It could be? Maybe just algae? I have attached videos of two different ones. In the fist video it is hard to see where it is coming from because it appears to be inside a crevice at the base of the rock and bad angle to see. The second video the tenticle appears to be coming out of the sand.

 

[mikemathis555]

I’ve heard of mini brittle stars being introduced with live rock, sticking their tentacles out to feed. Tough to tell based on the video.

 

[Backer]

Don’t think it is brittle stars as I don’t see them anything at the base of the feeding tentacle . . After doing some research I Am thinking digitate hydroids maybe.?Do they move around the tank or once set stay put? The more I look the more I see them piping up around the tank.

 

[Backer]

Bump