welks or Nassarius snails

Can Some one tell me an easy way to tell the difference between a welk and a nassarius snail?
I got my cleaning crew Friday I notice that what were supposed to nass. snails mad a bee line for the blue leg hermits that I got with them rolled them and latched onto the shell opening to opening and sat there for a long time. I would separate them and they they back in a matter of minutes. By the next morning all but 2 of the 11 blue leg hermits were dead. There are 5 of the nass type snails that hang around on the rocks, glass and occasionally on the sand. I have never seen those snails bury themselves like the other nass do. If I can figure out how to I will post a photo.
Any help will be appreciated.
Jerry C Lunsford
 
@Carl T wrote:
[url=http://http://www.melevsreef.com/id/whats_a_whelk.html]http://www.melevsreef.com/id/whats_a_whelk.html[/url] I never knew of Whelk snails... said:
Very good read I must have more Welks then :( wish I had more of the Nassarius types to stir sand. Just like the article said mine are always on rocks and glass. I do have 3 nassarius as they are bigger and always bury themselves in the sand.
 
Looks like I will have to pull them out to get a better look at them. The shell are not really that tapered on both ends as the ones in the article. but they are always on the rock work and glass some of them are never buried.
Thanks
Jerry
 
Top