"Relaxed, flexible diving holiday in North Sulawesi, Indonesia. 5* PADI Dive Resort Thalassa and her team dives in the Bunaken National Park, Lembeh Strait and Bangka Archipelago. Amazing coral reefs, abundant critters and fish life. The highest diversity in the world ..." 

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Alien Creatures in the Black Sand

The Lembeh Strait, on the east side of the peninsula, is covered with black sand, both under water and on the surface. Due to the large port city of Bitung many ships sail between the mainland and Lembeh Island, so do not expect a beautiful reef here. Nevertheless, it is a very interesting place to spend a day or two in search of extra-terrestrial creatures. You don’t believe they exist? That will change quickly when you see what the sharp eyes of the Thalassa guides spot for you. The Banggai Cardinal Fish, Pegasus, several types of frogfish, seahorses and many other strange creatures hide in the black sand. It feels a bit like treasure hunting for adults. 

New Thalassa shirts & bottles

Have a look at our new Thalassa shirts and bottles here. 

Guinness World Record

Thalassa team guest friends planting corals in front of Manado. Read more & see pictures here

IDC 2017


EFR Instructor 15 & 16 May 2017, IDC 18 May until 3 June 2017, Master Scuba Diving Prep Course 5-8 June 2017, I.E. 11-12 June 2017


EFR 13 & 14 October 2017, IDC 16 until 30 October 2017 (2 days off), Master Scuba Diving Prep Course 1-4 Nov 2017, I.E. 7-8 Nov 2017

Fund Raising Swim

On the 5th of June 2016 at least 40 students and alumni students from the Dive Tourism School in Tongkeina swam from the mainland to Bunaken Island to raise money for the Dive tourism school. Read more here.

Coral Day 2015

The Coral Day 2015 on Bangka Island has again recorded great success. See pictures here.