Need help ID'ing Nassarius vs Whelks

MelissaB.

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Hey everyone! Last Friday I got the 1st part of Tampa Bay Saltwater "The package lite" to start my tank with. I found a few snails, which 2 of the dark colored ones in the pic below in the cup on the right look to be Whelks as they have a mottled proboscis. I found the 2 whelks at night time cruising the rocks and took them out. But during the day today, I spotted the snail in the left cup crawling on the glass. I can't tell if the light colored one is a Nassarius snail or if its another Whelk? Both the shell and it's proboscis/body is much lighter than the 2 Whelks on the right and I found it during the day on the glass instead of at night when I found the Whelks. Can someone please help me ID the light colored one, as I'm not sure if I should put that one back in the tank or not? Thanks!



snail2.jpg

snail1.jpg
 

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