Meet the FishHunter Directional 3D: a smart fish finder that fits in your pocket and allows you to see what’s happening below the surface of the water up to 160 feet from 200 feet away. FishHunter lets you know where to cast. It maps your spots and lets you evaluate the bottom contour.
FishHunter has 5 tri-frequency transducers. It has WiFi and iOS / Android support. The device is also ready for ice fishing and works in conditions as low as -30˚C. More info is available here.