when i was younger there was a pond by my house w/ so many crays in it that if you sneaked up to the edge of the pond and then jumped it looked like the bottom was moving because of all the crays scuttling around. our favorite way to catch them was to mold some cheese or powerbait around a swivel tied to a stick or on a fishing pole and just let it sit on the bottom until we felt the crays fighting over it. then just pulll them out(they don't like to let go)