What are these guys?

[Jordan Tucker]

hey guys and gals,

These two tube looking things came on a live rock I purchased and after closer inspection I can see things inside of them move. Does anyone know what they are?

Thanks in advance!

 

[Crabs McJones]

Vermetid snails. Can irritate corals with their mucus webbing as seen in the picture. You can dab a little bit of super glue on the end of the tube to starve it out if it is bothering corals, otherwise monitor your excess nutrients in the tank, don't overfeed and their population should self regulate

 

[KJ]

Vermetid snail.