Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
That may also be an Olive Snail!
That may be a "dove" snail ... Columbella, I think?
My Nassarius climb the glass when I feed as well - especially if I hang a clam-on-the-half-shell in midwater nearby.
~Bruce
Here is the snail on the glassYou're probably right then, if it buries in the sand it's not likely a Whelk. Weird behavior for a nassarius though.

