Answer:
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.
Small edible creature from the sea that is often served at restaurants.
It can be in a hat, Or out of the bag. If you see it you'll be smitten, 'Cause it's fluffy like a mitten.
I am black and white and have flippers instead of wings but I still can't fly. What am I?
This noble creature has the embarrassing inability to get up once it's been flipped onto its back.
I fly to any foreign parts assisted by my spreading wings. My body holds an hundred hearts Nay I will tell you stranger things when I am not in haste I ride and then I mend my pace anon.