Had lots of luck with this in saltwater (tied here on salmon iron). Always liked the looks of this one, although it doesn't get much attention; change colors to suit your needs.
hook - Mustad 36890 #6
thread - Danville 6/0 black
tail - Flashabou silver
body - Diamond Braid silver
hackle - white
wing - Krystal Flash pearl, calftail, Krystal Flash peacock
topping - peacock herl
Part 1
mash barb, start thread (if you want it to go deep, add some non-tox wraps)
tie in a clump of Flashabou (10 strands here), double over and wrap back to point above mid-barb
tie in braid, wrap to tail and back; tie off and trim
tie in (folded) hackle, sweep fibers back while wrapping forward; tie off, then stroke hackle back and down while wrapping thread back for wing tie-in
tie in a few strands of pearl KF
tie in calftail wing (you can sub bucktail, arctic fox, insert favorite synthetic)