Can I use dead Nightcrawlers?
Consider using trout worms or artificial lures.
If a water does not permit live fish as bait, you can use dead baitfish, worms, nightcrawlers, or artificial lures.
Can you fish with frozen worms?
While many fish owners will happily throw the frozen bloodworm into the tank, this should be avoided, especially if your fish are sensitive to temperature changes. It can also be uncomfortable for their digestive system.
What happens if you freeze earthworms?
The Kansas State University Research and Extension service says that earthworms can freeze entirely and be slowly thawed back to life.