This is just me but I have found the best use for DI is marking and helping dissect structure. Compare what you see on 2d to the down scan so you can start to understand and trust your 2d. Fish just show up as small dot's even on my 998. As LowPro described your smaller screen,and position of fish in beam is coming to seriously limit your ability to see single fish. Try locating something with full screen 2d then survey the area with full screen DI. It just takes time to really start understanding what it can do for you. Don't get discouraged.