A couple of big time catch and release fisheries that work. The kenai River in Alaska for one. Your allowed 1 king per person. You can catch and release as many as you want. Once you decide to take your fish, you must put your rod away and only watch. (if partnered in a guided jet boat) Stealhead is another. If you were allowed the first Steelie no matter wild or not...how many wilds would be left on the Vedder for example..or Stamp. They would be fished out in a couple of years with the pressure those rivers get.