My grandpa's fairy tale

I think my grandfather was kidding...
Oceans of salty water full of marine animals? It's impossible! I shouldn't have believed in that!
Grandpa liked to make fool of me.
Oceans full of water? Really? How could I believe it...?

This is my first entry for the National Geographic Planet or Plastic writing contest.
English isn't my first language so it wasn't really easy to write this story, but I had a lot of fun doing it. I knew it would be hard, but I really wanted to try. I hope you'll like it!