Answer:
It has plenty of backbone but doesn't have a let. It peels like an orange but it comes from an egg.
To you, rude would I never be, Though I flag my tongue for all to see.
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 am a mammal that lives in the sea. I have flippers and am known for my intelligence. What am I?
I have no teeth but I can swallow my food whole. I slither on the ground. What am I?
What is so fragile that saying its name breaks it?