Answer:
I am an animal named after the animal that I eat.
What always goes to bed with its shoes on?
What animal always goes to sleep with his shoes on?
While I did live, I food did give, which many one did daily eat. Now being dead, you see they tread me under feet about the street.
I have a shell and live in the sea. I move slowly and can hide in my shell. What am I?
I hold two meanings. With one I may be broken, with the other I hold on. What am I?