Went to source 1. Used lasso to isolate the golden trout of my choice. Then copy/paste to fishermann photo.
step 2 of 3
I used the distort filter slightly on the golden trout. Then started to work with the fish reflection. Tricky, tricky!
step 3 of 3
Burned and dodge the trout keeping light in mind. Added some reflection to make the trout appear half out of water. Used a lot of zoom to to see more details while working.