Hitchikers on coral frag?

[Rirule]

It started like tiny white dot (i thought at first they were some parts of the tiny rock), but then grew, they sometime "close" like they breathe for a second.
Are they some kind of bivalve? Are they dangerous? I can't take better pics.

 

[Tahoe61]

Unable to define because the image is grainy, but I doubt it's dangerous.

 

[Rirule]

image is grainy

Yeah i know, its in a bad spot for a pic, but u can see in the first one, in the back, some black tentacles, cilia, idk what those are, but they are growing fast.

 

[Tahoe61]

But it is stationary, and the only movement you see is opening and closing?

 

[Rirule]

But it is stationary, and the only movement you see is opening and closing?

Yes, only little subtle closing

 

[rayadog]

Yea I couldn’t see anything but the overall shape looks barnacle-y. Idk if @Tahoe61 was alluding to that already.

 

[Tahoe61]

Yea I couldn’t see anything but the overall shape looks barnacle-y. Idk if @Tahoe61 was alluding to that already.

Didn't even think about it, missed it completely.