Help with Unknown Snail in SPS Tank

[fraggin corals]

I have countless number of this type of snail in my 65 sps tank. They don't seem to be larger then about 1/8 inch long, have a spiral shell and are brown/black and white color. Hoping they are not pyramid snails.

 

[markalot]

I am plagued with these as well. If the stalk is striped brown and white then it is a whelk of some sort that appears to prey on various worms.