It seems simpler to allow a void to fill with the surrounding material
(sea water) than to try to force it out and replace it with a gas.
Unless you wanted to lighten the shell, why bother?
Allen

On Wed, 16 May 2001 17:26:02 -0500 Linda Bush
<[log in to unmask]> writes:
> Hi, Conch-Lers!
>
> I read in a shell book yesterday that the knobs of a Lion's Paw
> (actually Nodipecten fragosus) are filled with liquid when the
> animal is alive.   Can anyone verify this for me?   This is the
> first time I have run accross this statement.
>
> Thanks,
> Linda
>