When I fished with Tom Albury in Abaco a couple weeks back I started off with a fly that looked super sweet (and I was kind of proud of) and the fish absolutely hated it. I tend to be a Presentation > Fly Selection kind of guy, but there was clearly something about the fly they stabby, stabby hated.
I opened up my three fly boxes for Tom to select from the hundreds of flies I had brought along. He picked out a fly I tied on a whim and had never fished. It was a gotcha, but it had no craft fur or bunny wing. Instead, it was a wing of just more UV crystal flash. When that fly entered the water it looked like a little firework suspended in time at the moment of explosion. It lit up brilliantly, all sparkles and glitter.
The first cast with that fly and the fish charged it down, eager and determined to get it in its belly.
Kept that fly on the rest of the day and every fish that saw it ate it.
Here’s a version of that fly. Pretty simple. I put a strip of black crystal flash down the back (to mimic the vein on a shirmp) and put some UV cure goo on the back, giving it a keel and a “glass back.”