What is this mystery creature?

[Jmerriott]

Not sure if this guy is good or bad. Found it after the lights were out. When touched the skin appears to peel back exposing a hard white ball like back (pic 2). Strange one. It's going in the sump until I know what it is. Thanks folks

 

[ros_sco]

Looks like a cowrie

 

[Saltwaternooby]

Cowrie for sure

 

[toky916]

http://www.reefkeeping.com/issues/2004-07/rs/index.php

Just a little article.

 

[Jmerriott]

Thanks