What is this growing on my live rocks?

[JKay]

Hello everyone! Just checking to see what this thing is growing on my live rocks. There's probably like ten or more of them scattered around. It's hard as a rock to the touch and it also shoots out a web like string. Should I be worried about this?

 

[Daddy-o]

Vermetid Snail. I smash them and my fish and Arrow Crab eat the guts.

 

[Daddy-o]

You can also Superglue the opening

 

[cracker]

I smash them & The Copper Band takes care of the rest !

 

[Hely'sreef1]

I think they're vermatid snails. I have loads in my tank. Generally they're harmless and can filter feed the water. They send out long stringy things which can bother your corals though

 

[JKay]

Thanks everyone! Guess I'll start using some super glue because they're too small for me to try to smash with a hammer or something.

 

[Daddy-o]

I have a very long regular screwdriver that I put the tip on the vermetid and hit the handle with a hammer.