thinking about those crawdad traps... others gave good advice about using the long cylinder traps with the cone on the inside going to a smaller hole. I was told the traps can be setting on the bottom and the crayfish can swim up off the bottom and into the hole. Then snrub says the crayfish crawl up a ramp and fall into an area with bait.

So if the crayfish can find the hole or can find the ramp by swimming, why can't they swim back out of the hole or swim back up to the top of the ramp that they came in by?

I guess this also would apply to the minnow traps that are designed the same way, how many minnows find their way back out of the trap if you are in still water and no current is involved?