Small Red Cones

[chadfish]

I'm starting to see a lot of very small red cones crop up around my tank. Anyone know what animal makes them? I'm sorry I don't have a photo, I can't get one worth using. They are attached to rocks, generally pointing horizontally, are red, about 1cm long, and look like tiny volcanos. I don't see any worm poking out during the day or at night, so I'm perplexed.

Thanks

 

[Goaway]

Do they move? Or just grow in one spot?

 

[chadfish]

They don't move - they are affixed to the rock

I'll try to get a photo

 

[chadfish]

Here’s a photo I just snapped

 

[gtguy256]

Those look like vermetid snails

 

[chadfish]

Those look like vermetid snails

Yay! Fun. /s

 

[MaxTremors]

+1 on vermetids.

 

[chadfish]

Can I snap them off with needle nosed pliers, or must I use bone cutters?

 

[Goaway]

They remove easy. Even tweezers will work.

 

[gtguy256]

Yep just make sure to get the whole thing