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