ID please

[RELLIK-REEF]

Anyone have a clue to what these are?

 

[KJ]

Vermetid snail.

 

[Bapeluso]

+1 with @KJ On vermetid snail. Can bother corals by casting we like material to catch food. I normally use loctite glue to glue the opening shut. Can also be manually removed with a pair of needle nose pliers and rinsing with saltwater, making sure entire shell has been removed

 

[RELLIK-REEF]

Thanks much appreciated info.