Who can ID this?

[WayneSg]

Please have a look at the attached pictures and let me know what you think these are. There are several of them growing in various places of my tank. At first I thought they were anemones but when I touched one it was very hard like a coral. My tank is a 20 gal Nano tank 5 months old. Thanks

 

[Crabs McJones]

Vermetid snail

 

[WayneSg]

Is this cause for alarm? I am checking it out on YouTube. Thanks for your help. I would never have thought it was a type of snail.

 

[WayneSg]

Question. If I just break off the tube will that kill them? Or will it just grow back? Thanks

 

[sfin52]

Question. If I just break off the tube will that kill them? Or will it just grow back? Thanks

Thats how you do it

 

[alysak6075]

Question. If I just break off the tube will that kill them? Or will it just grow back? Thanks

might want to add a dab of super glue on top too.