Whelks vs Nassarius

[Coasting]

my nassarius are frequently on my glass and every so often, though a lot more rare I will see one on a rock. But theyve grown quite fond of the glass, its funny watching them fall off it too.
Maybe post a picture so somebody can tell you what kind of snail you truely have. I dont think stores actually sell whelks do they?

[RenHoek104]

So I can't see the rogue snail. My pictures will come up as soon as it shows up.
Ren