If you want an easy way to do that, it is possible, with limitations, to get a good look from photos of fish pasted onto white stick-on decal media. Since computers don't print silver well, and silver or hologram media doesn't do a good job on fish, you need a good quality photo up close of a fish that doesn't have a lot of silver in its colors, like perch, smallmouth, brook trout, brown trout, probably a lot of the salt water bottom fish.
It is hard to get that quality photo, but with practice it can be done. Sizing it is somewhat important to get the pattern life size.
I'll post a pic of a brook trout and perch pattern that I did.
[
www.rodbuilding.org]
[
www.rodbuilding.org]
