What are these tube critters?

[Ferrell]

I’ve noticed these little critters in various locations around the DT and extend their “tentacle” when I feed roids or at night when I feed plankton to the pods. I also noticed a bunch spouting from my favites (1st pic) which was one of the earliest corals. They are about 1/4” long but have huge feeder sweepers.
I love diversity in the DT just curious what they are and if ok.

 

[Ocelaris]

Vermetid snails actually. They wax and wane in numbers, but are generally unavoidable.

 

[Ferrell]

Thanks. Appreciate the quick reply

 

[samnaz]

Vermetid snails. Get rid of them now while you can.

 

[elisa h]

I don't find vermetid sails to be too big of a nuisance. They're filter feeders.

 

[samnaz]

I don't find vermetid sails to be too big of a nuisance. They're filter feeders.

That was my thinking too, and then they took over all my frags

 

[OriginalUserName]

I don't find vermetid sails to be too big of a nuisance. They're filter feeders.

They seem to irritate corals but mostly I hate cleaning their shells off the back glass.