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New depth finder question

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Say you're on zoom mode. You're watching fish on the bottom, or so you think, there's the separation from the fish to the bottom, about 1 (line?)'s width of black from the yellow to the red. Now you're watching and the red (bottom) creeps up and no more fish, just all red. Is this a larger walleye / nothern that hugging the bottom right below me and the vex is thinking that's tbe bottom? Or am I just on weeds which have floated back in and covered the bottom for 8-10"?


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Excellent Question.
My interpretation is that it's some of both. If you know you're fishing a hard bottom and "the bottom moves up to your bait" my guess is that it's fish. When fishing open water, I think it's harder to interpret because of boat movement.
If you're fishing over a soft bottom or near weeds, I think it's more likely to be weeds or a change in the bottom structure.
I hope this helps.

Good Fishin!

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