Breathe in, breathe out. The first and most emphasized rule of scuba diving is to breathe, keep breathing and all will be well. If you are new to the activity, scuba diving is underwater diving where the diver uses a self-contained underwater breathing apparatus (aka scuba), usually by carrying a tank of compressed air. Jordan Tidd is seen in this photograph breathing with her tank creating the famous scuba bubbles glistening in the sun's shine down into the ocean. Her little sister, Jamie, helped her capture this piece by stabilizing the camera as Jordan swam by it through the bright rays taking a breath.