There seem to be comments ad nauseum about light down deep, covering shrimp pots, fishing lights etc... One set of comments that struck me the wrong was was dealing with covering shrimp pots. The comments that threw me were "I can't see that deep, there is no light at 600 ft." Well, maybe there is. What you perceive isn't the same as sea creatures or animals. That is like comparing your sense of smell to a dog or bear, eyesight to a hawk or eagle. You get the idea. I'm not saying that covering stuff or using lights will help, but I am saying there is light at 600ft.