shell, clamp, sea slug.......?

Hi all

Can anybody help me what this exactly is? hell, clamp, sea slug.......?

For information the picture was taken at the dive site Black Rock, 23.02.2008 Myanmar / Andaman Sea.

Thanks a lot!

Hi,

it`s Crenavolva Tigris, family of Ovulidae - eggshells.

Excellent shot, beautiful animal!

cheers,

Bargi

Thanks a lot for the identification. Thanks to my dive guide, otherwise I would have past by the tiny thing......