JL .... those "resting" fish might also be larger fish, or even fish of a different species, just hanging out under the carnage going on in the baitfish schools, waiting for an injured/dead one to flutter down to them. Easy meal with little to no effort !!
I know it's each to their own, but I still fail to see where 2d screens are of any major benefit when the DI screen is showing a much better rendition of what's actually down there. And when you use the full screen in DI ... whoa !! It's almost as good as having a camera down there.
I sometimes hear people say they like the DI so they can better interpret what the 2d is showing them (to which I say "to myself" ... then why do you even bother with the 2d images, in the first place, if you need the DI image to interpret the 2d image ) Old habits are hard to break, I guess
... cp