I need your help, with shells.

[clinton9]

Hi members,
I have problems with shells, Few days ago I had frozen the seashells in three plastic jars full of water both helmet shells (semicassis pyrum) and ostrich foot shells (struthiolaria papulosa), but on next day I found they had cracks and damages in shells, so I discarded them.

In 1990s I boiled the seashells, but 20 years later the seashells had lost their colours and glossiness. So I stopped boiling the shells.

I had seahells in my jars full of cold water and I did not enjoyed shaking the dead animals out of shells, with my right hand. they are start to smell bad.

Can you please help me...How can I remove the animals out of alive seashells, without boiling & freeze the shells, and without cause the shells to crack and colours & glossy to fade ???