The tiny Mahengetang Islands have some pristine hard coral reefs in very clear water. The surrounding seas are over 500 metres deep. Underwater boulders can be seen bubbling away as sulphur steam escapes from the rock, an indication of the volcanic power below. Reef life is prolific and big fish sightings are always possible. 
Siau Island is home to the Karangetang volcano, one of Indonesia's most active which can often be heard rumbling. There are some impressive wall dives here where colourful soft corals and seafans contrast dramatically with the underwater topography created by laval flows. Fish life is vibrant with a huge diversity of species.
Ruang Island also has some impressive wall dives where sharks, rays and other pelagics can be seen. Here also, huge subsurface laval flows create a dramatic seascape.
Biaro Island, the closest to Manado, has many excellent dive sites. Submerged pinnacles to the north have excellent coral growth and attract bigger fish. To the west are some sheltered dive sites that offer great day and night dives. |
