Some of you may have heard of Don and/or come across one of his many articles in various dive and adventure magazines. Besides being just a photo journalist, Don also goes the extra mile to comprehensively study each destination that he visits beyond just diving them, one of them being the North Sulawesi. If you want to know more than just the fishes in the sea, follow this link to read about the geographical history, how diving started in Manado, the Indonesian through-flow and the Wallace Line, this is it!
Form his website, you can find many other resources and while you are there, why not sign up for updates from his site!