turn fish ID of and learn to read the echos, Reason being throw a rock or stick under the transducer with FISH ID on and it will show up as a fish, as that is all the unit knows. Turn it off and you will see the difference, Then adjust sensitivity accordingly
I have the Humminbird 160 Max portable FF. I too have the little fish icons and i just checked to see if i could turn the fish ID off and i cannot. this unit is only about three years old it was a cheap unit i bought for ice fishing but never did ude it for that purpose. I rely on it mainly for depth so i don't hit bottom/weeds while trolling. To answer your question i kinda believe that if you are in shallow water and mark a "big" fish it could be a 10" perch but then while in 50' of water and mark a "big" fish it could be an 8lb Landlock. I kinda ran into this last year when i marked a large fish and it turned out to be a perch. like i said i mainly rely on mine for depth readings. I am looking into buying a color fish finder that is a little more $.
Yes you are correct I was able to turn the fish id off. I held the power button too long. Thank you