Marine recreational fishing is popular and can impact fish stocks. A study on the western Baltic cod fishery looked at how new rules affected fishing. They found that setting limits on how many fish can be caught reduced removals and slightly decreased fishing. Different rules had varying effects on fish size and angler satisfaction. The best approach was a mix of high bag limits, seasonal closures, and size/slot limits to protect cod without hurting anglers. It's important to consider fishing methods and angler preferences when making rules to avoid unexpected consequences.