Please ID on coral and powerhead

[SteveEreef]

I starting having these on this coral as the anemone has been stinging it. It’s also on another digi (not sure about the spelling) that a frogs spawn has been bothering. I think the powerhead has the same pest. What is it and how do I get rid of it. Thanks

 

[Crabs McJones]

Vermetid snails
Filter feeders. Their numbers can be reduced by cutting back on feeding and limiting excess nutrients in the tank.

 

[SteveEreef]

Vermetid snails
Filter feeders. Their numbers can be reduced by cutting back on feeding and limiting excess nutrients in the tank.

Thanks so much for you quick reply. Greatly appreciated!