Ofcourse you must not miss it.
You can also rent a boat and go fishing. The owner of the boat will be happy to take you fishing for really cheap. (i forgot how much)
Equipment: bring your fishing gear or just rent it from the fisherman
One of my friends took Yoga 101 in school. She became our Yoga instructor and we got this idea to have yoga session by the beach. I think we're the only crowd who had yoga session in Pangumbahan. It was really nice, especially when you have to bend backwards and you're facing this beautiful Indian Ocean..
Equipment: just shorts and t shirt :)
This is what the local kids do for fun. Play soccer on a beautiful empty beach that streched as far as the eys can see facing Indian ocean ^__^
Equipment: boardshorts :D plastic balls