Looking for where the Rainbow trout are hiding in our pond…(Using NIDI non invasive diagnostic

So first I took a stock photo of a rainbow trout…

Then I edited it in Pixlr.com/editor…I noticed a thin red line inside the trout, maybe the spine?

Anyways…I would look for thin red lines in the Pond picture…

When I looked at the rainbow trout in Fotoflexer, I noticed a large amount of the whitish Aluminum cholesterol colour…I would look for that in the Pond picture too…

So that is how I found where our new Rainbow trout were hiding…

In the deepest part of our pond, sort of in the middle, I could see a large swath of that whitish pink colour…The cholesterol(aluminum on the grove body part chart)

To confirm, I also saw thin lines of the red…In Pixlr…