I can't see any reason to stop fishermen using single line to catch fish.Verde Island near Puerto Galera is my favorite. From what I have seen it has the biggest fish population in the Philippines. I was lucky enough to see a 20ft whaleshark there around 18 months ago. It's concerning to see sometimes 20-30 fisherman on the dive site. That area is one of the best in the Philippines and should be a no fishing zone in my eyes.