An oyster
A. Bliss
The deep sea suckled me, the waves sounded over me;
Rollers were my coverlet as I rested on my bed.
I have no feet, and frequently open my mouth
To the flood. Sooner or later some man will
Consume me, who cares nothing for my shell.
With the point of his knife he will pierce me through,
Ripping the skin away from my side, and straight away
Eat me uncooked as I am...
The answer: An Oyster.