There is a number of liveaborads operating in Sulawesi waters especially in North Sulawesi that covers the diving in Bunaken, Lembeh Strait, Bangka & Gangga and even a bit further Sangihe & Talaud Islands which is one of its highlights is the underwater volcano.
If you are interested in doing a dive cruise with one of these liveaboards, please contact Liwayne Adventure Tour & Travel to get the best deal.
Please remember this tour code: LW-LAB for more info by a click on the following link: Sulawesi Liveaboards Dive Cruise