The great thing about HDR is ...there is no right or wrong way to do it ...its an expression from the photographer...did you apply all 5 layers to the fish alone? it also fun to take different sections of the image and bring them to extremes...kinda like ....water , boat. fish, your coat all adjusted in HDR on seperate layers...then combining them to create an artsy feel..
Nice expression and nice fish too...
Cheers and thanks for sharing