Took me forever to find this one too. I was actually looking for Serangan but ended up in Sanur. I took the boat out for 50,000 rp ($5) and told the guy to get me in 2 hours. THere were tons of people out there. The whole session was a struggle to stay in position since the wind kept pushing us north. I had a few decent ones. A boat came got everyone but me and this japanese guy so we had to ourselves for about 30 minutes but I only took a few. I was super tired by the time my boat came.