Answer:
What do pandas have that no other animal has?
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.
Tall when seated, short when standing.
It can be white or blue or black, Humped or have a horn. And when it talks it sings its menuets, as it's travelling the depths.
This noble creature has the embarrassing inability to get up once it's been flipped onto its back.
You can always see it, but it's too far away to touch. Mountains rest on it, and at sea it surrounds you. What is it?