Here is one from my tank. Does yours look like this? If so, they are good little guys to have running around. Mine hide in the sand and come out when I feed The tank.
All nassarius are whelks but not all whelks are nassarius. There are something like 10,000 different whelks of which about 300 are nassarius and reef safe. Do you have any close up pics of yours?
Sorry to hijack your thread Ashna.
I bought some of those at the fish store and they are safe. I will try and find out the name tomorrow. Mine live under the sand and come up like a submarine when I feed the fish. No problems here.