I received a shipment of a cleanup crew in with the hermit crabs was a snail that had a shell like a small conch I am not sure what it is and would liked the extra crab instead but ended up with this is it reef safe?
The shell looks alittle too big for a Nass. species so I think House and your first hunch are correct a Strombus species, fighting conch. Two eyes on the end of stalks are the tell tale signs.