Bear with me. Here is a you tube link to an underwater video of a couple weeks ago of one of my shrimp pots I dropped in Prince William Sound.
At around 6:50 you can see a tanner crab moving by
At around 8:20 you can see how a shrimp enters your pot
I am working on the lighting for the next video and there is a secondary light off to the right that is not as bright. Seems some shrimp like the light, some do not. Also how much other action there is.