Rescue The Mermaid

You are a deep sea diver and you know the water world better than many. That is the reason we have chosen you for this daunting job. We have confirmed information that some people have found a mermaid and they have trapped the mermaid in a cage. I am sure they will be going back to get the mermaid out of the water world. I would like you to go to the bottom of the sea and rescue the mermaid and set her free. Well, I know that it will not be an easy job but I would not have chosen you if it was going to be easy.