I live on a small pond that has a good number of bass, bluegill, and catfish. I fish during the day with plastic worms and can catch largemout bass most of the time. I always have a catfish liter with 2 hooks sitting in the water with a nightcrawler and some berkley power catfish bait (liver). I never catch catfish during the day. If I fish off a dock with nightcrawlers during the day the bluegill tear them up as soon as they hit the water. At night if I drop a nightcrawler in the same spot I was fishing during the day the only thing that eats them are the catfish. Why do the catfish only feed at night and how does a nightcrawler get past the bluegill at night if they are still in the water also?