Sometimes called a salmon egg pattern - I've fished with this in Alaska and Washington with great success. On the world famous Russian River on the Kenai Peninsula of Alaska - I would catch a nice 19" rainbow trout of the wild kind. In the Kenai I would hook up countless times but never land anything because they're too strong. In the world renowned Lake Lenice selective fishery I would always hook up there with a glo bug fished under a strike indicator. I would cast pretty far and then let it drift and hang up on some weeds or slowly tug until it would stop on a fresh water weed or something. Then when the bobber disappears I would quickly retrieve and fight a fish. At Lenice that's what it all about for me. It can be drifted with a split shot three feet above the fly pattern or it can be fished maybe 9 feet under a strike indicator in a lake or something. Now if you have all three still water patterns that I recommend - the red chironomid, the red San Juan worm, and this glo bug - then you've really got it locked up.