Once upon a time, there was a little fish named Fin. Fin lived in the big sea with his family. Every day, the tide would go up and down, and Fin would play with his friends.
One day, Fin found a big shell. It was very interesting. He thought it would be fun to act like a crab and live in the shell. So, he swam into the shell and started to act like a crab. He walked sideways and pinched with his fins.
Fin's friends saw him acting like a crab and thought it was funny. They all laughed and clapped their fins. They wanted to try it too. So, they all found interesting shells and acted like crabs. They had a great time playing in the tide and acting like crabs. And they all lived happily ever after.
