Definitely a cowrie. I am calling the store today and complaining because they could have eaten my anemones.
Anyone in the NYC area want it? Super cool, just not for a reef tank. Right now he is chilling in the sump (actually cleaning it nicely).
I will get a smooth picture - but in the meantime you can look them on live aquaria and they have them pictured smooth.
"At the age of six I wanted to be a cook. At seven I wanted to be Napoleon. And my ambition has been growing steadily ever since." - Salvador Dali