Save My Fish

You are on a rescue mission to save the little cute fish from eaten by tons of sharks in the ocean. Sharks are strong and creatives, they will attack the fish in all sorts of possible ways, they can move your defense line, they can create a special force to lift your defense line also.
Think of intelligent ways to save the fish , draw your defense line, it can be a single line, a square, a circle, a house or even a big shelter. Your imagination will determine how you can save the fish from shark attacks.
Start the rescue mission now!