What is this snail looking thing?

[PhamtonBlue]

Saw this while I was scuba diving. It looks like some kind of snail as it's a shell with all those patterns on it. But when I touched it all the patterns sucked in to the underside like a snail going back in it's shell. It's the coolest snail i've ever seen.

 

[Sugar Magnolia]

Looks like a species of cowrie.

 

[ManEatingGuppy]

flamingo tongue.

 

[Sugar Magnolia]

flamingo tongue.

Yep.