Weird curly black things growing

[SHNICI]

Those are not spirorbid snails. They are smaller vermetids. Spirorbids are much smaller and will grow on glass and rock in low flow areas but are flat and the end of their shell doesn't come outward/upward like the vermetids do, as you can see in the last pic you posted there are several that are clearly pointing up away from the spiral body at the end.

That's not vermetid snail (THE White curl SP) It's like @JGT say spirorbid , nothing relied with vermetid

 

[SHNICI]

I have spirorbids and I have those white vermetids as well as the larger black ones in this post. Stick with them all you like but to the poster so you are not mislead, they absolutely are vermetid snails. No disrespect but I know this for a fact.

Please show me one of this facts, really you aren't right that way, at the beginning because of the blurry photo I wasn't sure and only guess, because of that I ask for better photo!
Saying it's vermetid snail, you will make him to scrape every single bit of his LR, and they will keep coming all the time he have reef tank.

#reefsquad Please someone.

 

[4tanks]

Without doubt spirobids
@schici completely agree

 

[KrisReef]