Curious what are these?

[reefwars]

Ocean fresh pacifica plankton great food I use a lot of, its def the phyto sponges love it

[Myka]

Are the tubes easy to pull off? If they are easy to pull off they may indeed be tunicates (sponges). If they are stuck on there pretty good then they are probably hydroid tubes.

[11purewater]

Hydroid,or even vermatids i was thinking at first,but those Zoas would be so stung that pic from OP would look a lot differant.