Hard to tell with that color palette ... but, then it's sometimes hard to "see" fish on a downscan, anyway. They could show up as dots or small blurs, depending on depth &/or settings being used.
My unit is the Elite 5DSI ... and I prefer the blue color palette. It's just easier on the eye, and seems to separate cover/fish into more easily recognizable images. Like these :
Fallen tree
Tree w/fish
And, yes ... I do use 800kHz in shallow water (<20') and you can see the results.
I did use another color palette, for awhile (until I tried the blue) and these are the images I got :
Brush Pile
Standing Cedar tree
And while I could determine what I was looking at, for the most part, you can see the striking differences between the two color settings. The images are, to me, just too "busy" when yellow, green, red combos are used ... and smooth out when the blue is used.
(Note: on the screen shot of the standing Cedar tree, you can ignore the fractured image in the right half of the screen ... I have my transducer mounted on the trolling motor, and had to zig zag to avoid running into the top of the second Cedar.)
... cp