Ao from the dictionary explains is a big fish, tattoos in the ao have a design into the dragon head fish body, I think it is and fish leap Dragon Gate legend has something to do with it, the legend of the fish a cross the Dragon Gate became a dragon, is that in ancient times, after the exams to obtain the merit of the identity is not the same after the examination, you did a tattoo of the ao, I feel that the statement is, as long as the efforts, hope is in front of us, success is inevitable you this fish will become a dragon