What am I riddles

I'm tall when I'm young and I'm short when I'm old. What am I?

I live in the ocean. I like to eat crabs. I can change colors. My eight legs are called tentacles. I am an...

I never ask questions, but always answered. What am I?

I go around all the places, cities, towns and villages, but never come inside. What am I?

What has one head, one foot and four legs?

Armored but not a knight, snapping but not a twig, and always at home, even on the move. What am I?

I have three eyes but only one leg. I still close one even if you beg. What am I?

You can easily touch me, but not see me. You can throw me out, but not away. What am I?

I look taller when I am young. But as I get old, I become shorter and shorter. What Am I?

To you, rude would I never be, Though I flag my tongue for all to see. What am I?