Contemporary anglers are blessed with a dazzling array of sonar and imaging tools to help them find success on the water. At the same time, we need to know what we're looking for when using tools like Humminbird Side Imaging, Down Imaging, and traditional 2D sonar to locate fish. In this video, Dr. Jason Halfen - The Technological Angler - details exactly what fish look like in each of the common sonar and imaging methods.