Biologic evolution

The shells of a dying unnecessary shellfish were collected today.
Will it be the one that months how many passed after it dies?
Because the shell of the dying shellfish was seen, it had thought.
How will the shell to have died return to the soil in the future?
It is thrown into the sea wave, and it knocks against sand, the stone, and the shellfish.
The shape of the shell might not be understood.
The color of the shell of the dying shellfish whitens.
Any shell is the same as this.
Though the shell picked up in the beach to have died also has the one that a beautiful handle still remained
The shell to have died in the sea whitens.
The shell in the photograph is the one having collected today (what to have died in the sea).
It has noticed here.
Does the shell corrode why?
It might be the one thrown by the wind effect in the sea.
However, I want you to see the photograph.
A lot of small holes are open to the surface of the shell.
Being able the shell's to be being broken because of the wave or to cut down the surface of the shell by friction
It is possible to understand.
Is a small hole open why?
It made it to doing a selfish usual imagination here.
The shell might been melted with salt water.
The salt is the one that has the resolution ability very much.
It is possible to make the metal corroded easily.
If salt water has power to melt the shell
Why does not the shell to be alive melt?
The shellfish might be doing the device to which ..alive.. , doesn't melt.
Very.
I imagined "Secretion liquid".
Not only shellfishes but also fishes have the secretion liquid.
Because I do not want to soak it in salt water, the shellfish might be vomiting the secretion liquid directly in the shell.