Togean Islands & Tomini Bay: Una Una Volcano Dive Site – Togean Islands & Tomini Bay
Site Overview
Togean Islands & Tomini Bay: Una Una Volcano is a remarkable dive site in the Togean Islands & Tomini Bay region, situated where nutrient-rich currents create thriving marine ecosystems that support extraordinary biodiversity throughout the year. The site features pristine coral formations descending from 3m to 30m, with exceptional coral coverage across every depth level. Una Una is an active volcanic island with black lava slopes, sulfur vents, and unique marine life. The site is accessed from Ampana by boat and is best dived from April through November during the dry season when visibility reaches 20 to 30 meters and seas are generally calmest. Togean Islands & Tomini Bay: Una Una Volcano remains one of the less-dived sites in the region, offering pristine conditions and uncrowded experiences that are increasingly rare in popular dive destinations. The coral diversity and fish density at this site consistently impress visiting divers and underwater photographers alike. The underwater landscape is characterized by pristine coral formations that have thrived in the nutrient-rich waters of the Togean Islands & Tomini Bay region for decades, creating a living reef system of remarkable beauty and ecological importance. Divers consistently report that the marine biodiversity encountered here rivals even the most celebrated dive destinations in Indonesia, with healthy coral coverage extending from the shallow reef crest to the deepest sections. The relative isolation of Ampana as a dive hub means that the reefs have experienced minimal dive pressure, preserving their pristine condition for future generations of divers to explore and appreciate.
Dive Briefing
"The dive begins with a descent from the boat onto the reef crest at approximately 3 to 6 meters. Your guide leads you along the reef slope in the direction of the moderate current, descending gradually to 25 to 30 meters. The reef is covered in dense hard and soft corals at every depth, with resident turtles, Napoleon wrasse, and schools of reef fish throughout. The deeper sections feature sandy ledges and overhangs where whitetip reef sharks rest during the day. Throughout the dive, your guide will point out notable marine species and interesting coral formations that you might otherwise miss. The variety of habitats ensures that every minute of the dive offers something new and exciting to discover. Your guide signals the ascent and you work your way back up to the shallower reef at 5 to 8 meters where the coral garden is spectacular in the sunlight. The safety stop is conducted along the upper slope before surfacing near the boat. Total dive time is typically 50 to 60 minutes depending on air consumption and the depth profile chosen."
Signature Marine Life
Grey reef shark
Carcharhinus amblyrhynchos
Giant trevally
Caranx ignobilis
Eagle ray
Aetobatus narinari
Barracuda
Sphyraena barracuda
Whitetip reef shark
Triaenodon obesus
Safety & Hazards
- Moderate current along the exposed reef requiring drift diving technique
- Deep sections at 30m requiring strict depth and air monitoring
- Fire coral on the shallow reef flat requiring careful buoyancy during ascent
- Sea urchins on rocky sections and rubble patches throughout the site
- Boat traffic on the surface requiring proper SMB deployment during ascent
Traveler Notes
Who is this for?
Togean Islands & Tomini Bay: Una Una Volcano is an excellent choice for intermediate to advanced divers with Open Water certification and at least 20 logged dives. The moderate current and reef slope profile make the site accessible while still delivering world-class marine encounters. Underwater photographers will appreciate the mix of wide-angle coral scenery and macro critter opportunities found throughout the site. Good buoyancy control is essential to protect the fragile coral formations and to maintain position in the current. The site rewards divers with high biodiversity, healthy coral growth, and regular encounters with large marine species that make every dive memorable and provide outstanding value for the adventurous diver seeking remote Indonesian destinations.
Quick Stats
Dive Logistics
- Togean Dive Resort
- Una Una Dive
Photography Info
Best for: wide_angle, macro
Nearby Stay
Ampana Dive Resort
Ampana • 35km away
Ampana Island Hotel
Ampana • 35km away