So I belong to a kayak association for the Pacific Northwest. A guy set is gopro onto the crab line and took these videos of Dungies coming to the trap. It was interesting to me because I had never seen the actual crabs entering the pot. You can see how they come in from one direction. I first thought it was down current but they continue to come in from one side after the current changes. So not sure about that.
the other thing he realized was that like may people he hung the crab bait from the top of the cage. But you can see how many crabs just sit their and feed on it then go away without getting caught. It certainly looks like a better deal to pin the bait on the bottom but he is still experimenting.
I wonder if the same thing applies to shrimp? A little harder to get shrimp on vid with the depths. I found it interesting so I thought I would share.