The fish finder rig is great for targeting flounder along the bottom. When you need to add some heavier weights to your bait, the fish finder rig is one of the best ways to do it.
A simple drop shot rig works great for flounder. Just make sure you have a heavy enough weight to keep your bait near the bottom.
A simple jighead and minnow is one of the most popular ways to fish for flounder in the bays. Many of the bays will not have a ton of current and a jighead will work great in these situations.