Short what am I riddles

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. I am a...

I live in the ocean. I move slowly. I eat clams. I have five arms. I am a...

You can break me easily without even touching me or seeing me. What am I?

I have keys but no locks. I have a space but no room. You can enter, but can't go outside. What am I?

I have lot of memories, but I own nothing. What am I?

I hiss. I can be poisonous. I am long. I have a forked tongue. What am I?

I have no life, but I can die, what am I?

I have seas without water. I have forests without wood. I have deserts without sand. I have houses with no brick. What am I?

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

What has one head, one foot and four legs?