Answer:
I'm a marine mammal with flippers that balances balls on my nose and barks. What am I?
With four oars it swims but it is always at home. Its back is like armor, tougher than chrome. What is it?
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
I have a very long neck and eat leaves from tall trees. What am I?
What jumps when it walks and sits when it stands?
I love spinach.