I grew up fishing worms for stealhead in the summer. I dont know how many times I would be out fishing for trout wading the green when I was a kid with about a inch of night crawler freedifting with the current in small holes that a steelhead would take it. I caught one once about 3 feet from my feet in about 8 inches of water. I was letting it out and saw a big flash and splash fish on. I have often thought about coloring a real night crawler and seeing how it would do. They sell stuff that will make them green and glow that you add to the dirt and weight a couple of days for them to digest the stuff. People die prawns and eggs dont see why you couldnt die a worm. They get soft pretty quick when their dead so maybe brine them like a herring. Anyone ever attempt it.