The Manasquan is probably the best place to fish for numbers and sizes of fish, as well as variety. I like to fish this river with killies. I have caught everything on it. But, the flounders love them the most. Also make sure you run the hook that you use a size 1 preferably through the fish's eyes.
Most people run it through the lips.
This not only kills the action of the bait but also the bait itself. This is definitely what you do not want to do. All saltwater fish like something moving at all times. So just run the hook through the eyes. I use a smaller hook like a size 1, because most killies are pretty small, however they are the most effective.