In the original fishing girl game, there were 2 endings. You could catch the island and drag it back w the stranded creature (your sibling maybe?) on it, or you could use the bomb lure to kill the sharks and once they were dead it was safe for the stranded person to swim back. If you didn't kill the sharks youd get a well done they all lived happily ever after... but so did the sharks! Message which was when i realised the point of the bomb lure was for sharks.
Really enjoyed playing this game :)