False Nassarius Snails?! HELP!!!

[invalid]

About 4 days ago I ordered 15 Astrea Snails and 20 Nassarius snails from Etropicals. Over the last 3 days I've noticed the nassarius huddled in a big group (can I say orgy here?), and when I come back later there would be an empty Astrea shell. This has happened 4 times since the first incident. I wasn't sure if they just ate a dead Astrea, and even then, I didn't think the Nassarius species were carnivorous -only detrivores. Could these be the snails that are mistaken for Nassarius? They do seem bigger than a expected [about 1"], and I thought they were only supposed to get up to .5".
Could someone post a pic what they should look like, included the actual snail.

Thanks,
Greg

 

[Emperator]

nassarius are not true detrivores, they are carrion eaters. once they get the scent of dead or dying animals, they will swarm like not other.

however, a picture of the snails can help in the indentification.

[ December 04, 2001: Message edited by: Emperator ]</p>

 

[Anemone]

This discussion has been going on over at Reef Central - http://www.reefcentral.com/vbulletin/showthread.php?s=52650f2edb642d99fc12a740ef326317&threadid=48444

To summarize, ETropicals mistakenly shipped out whelks rather than nassarius. Call them. They are taking an active/positive stance in replacing the snails and "making good" on any additional damage.

Kevin