I have seen this a few times on my side scan, but don’t really know what I am looking at.
Can anyone shed some light.
Image is from my gen 1 hds 7, from a lake near Fairibault.
The right side of the screen is I believe sunfish spawning beds or dead spots in the dead weed bed.
This lake has a weed line of about 6′ because of the heavy algae growth stopping sunlight.
The left side is the bottom on the shallower side of the boat.
These spots are seen as deep as 25′ deep
Sorry I forgot to attach image.
image_6487327-scaled.jpg
Sunfish beds. GPS that spot for late spring time fishing.
Thanks for the coordinates in the bottom left corner of the screen. 
I’m probably going to demonstrate my ignorance of how side imaging works here, but isn’t 16 feet kind of deep for spawning sunfish?
SR
I am Humminbird guy but I think Steve is correct, the depressions are to deep for sunfish. And, they are a little small for sunfish spawning beds.
I would tell you that your contrast is to high, you are washing out the column under the boat and the left side of your screen.
My thought was this was too deep for bluegill beds as well.
As the original post said I saw this as deep as 25 feet.
This has nothing to do with the gain or motor propwash as in many areas the screen is completley covered and most times I can find the bottom change from mud to sand.
After getting side imaging I had to buy an underwater camera to take a look at some of the stuff I was seeing.
-J.
It is showing you exactly what is there. Soft bottom with holes (on the right).
What makes those holes? I dunno.
French Lake. Been there a couple dozen times.
Did you ever come across this.
I have several times, unfortunatley this lake is so green I doubt I would be able to see anything more than 6 feet deep.
how deep is it 60 ft to the right of the screen where the beds are?
Probably around 20 feet with those depressions running out to 25 feet or slightly more.
unfortunatley this lake is so green I doubt I would be able to see anything more than 6 feet deep.
Globs of algae?
-J.
Are you over a spring, bubbles coming off the bottom?
Are you over a spring, bubbles coming off the bottom?
I was wondering along similar lines. Did the OP go over this in downscan or 2D mode? Bubbles would have showed up then.
Doesn’t look like depressions to me.
Too many variables to give any kind of educated guess, but I would venture to agree with Jon’s algae comment
Doesn’t look like depressions to me.
I didnt think it did either. I would think you would see shadows if they were depressions, but it is deeper water so they might not be so evident.
I don’t think it’s springs as I was seeing it all over the lake.
It didn’t show up above the bottom.
My first thought was spawning beds, but I didnt think it would be that deep, or that wide spread.
If they are sunfish beds, that lake has a hell of a population of breeders.
I didnt think it did either. I would think you would see shadows if they were depressions, but it is deeper water so they might not be so evident.
Humps leave shadows. Depressions do not.
They’re small depressions.
It is not uncommon to find them.
Drop a camera. I’ve done it a many a time. SI shows you what is there.
Fish eat a lot of things off the bottom.
Mud bottom bring out a lot of bugs/worms in the warm water periods. I’d imagine there is some rooting around happening. Beds wouldn’t surprise me.
Once you get SI and learn to interpret, you’ll learn a lot about what is below the surface.
After getting side imaging I had to buy an underwater camera to take a look at some of the stuff I was seeing.
-J.
LOL, so true.
I’ve seen sunfish beds out to 18ft, but usually they are bigger than what you have on your picture.
You can tell the size of those circles?
After getting side imaging I had to buy an underwater camera to take a look at some of the stuff I was seeing.
-J.
I saw the same image on the St Croix. Couldn’t figure it out until I dropped a camera down. Turned out to be clams. (I guess they were ghost clams because they didn’t have any shadows. 
)
I was thinking a bunch of lead weights that are to deep for the loons to dive down and eat.
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