Just a quick look at how beneficial a fish finder can be when trying to locate schools of fish. I have a Garmin Strike fish finder that Big Al gave me and I love it. It is easy to use and small so its great for small platforms like kayaks. I believe hummingbird makes one that adapts to the predator quite easily. We are at the stage that the biggest concentration of fish are in deeper water and the garmin finds them and the rest is up to you.