I think I owe an apology as euphausids weren't registering in my head last night when I typed up my post. I was thinking of other amphipods that I commonly find living amongst the cobbles down at the beach.

Mr. Singletary is correct, euphausids are predominantly orange, red, pink in color. I wish I had a camera last season when I was fishing at Point No Point, I scooped up a lone euphausid from the water and it was clear infused with red. Can't remember if it was I or my dad who caught the coho, but it's stomach was filled with the exact same type of euphausid I had picked up from the surface of the water. Unfortunately, I don't think that you could have really expected to land a coho on a scud pattern that small.

I would have to second the use of a shellback of some sort in your scud pattern.