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How to fillet trout
Hold the trout with one hand pointing its head to the sky, or simply lay the fish on its side on a cutting board.
Take a knife starting at the anus and gently cut the fish along the belly.
Continue the cut all the way to the throat.
Insert the knife into the tissue between the trout's gills (near where its " collarbone " would be). Cut outward, perpendicular to the belly.