The lightning whelk seashell is one of my favorites, with it’s stripes and long shell opening. It can grow to quite a big shell also. I have seen many of these shells, and have some in my collection, but this is the first time I have found a live mollusk inside a lightning whelk shell.
I have a little video below.
This shell had a particularly white spire – top swirl – and there was no hermit crab inside. Honestly, I had expected to see one when I found the shell moving around on the soft sand of the river bottom.