Nathalie Lasselin

Nathalie Lasselin is a multi-award winning underwater cinematographer and documentary producer. 

As a technical diver, she has filmed and explored deep wrecks and caves in more than 50 countries. She shares her passion for diving through dive instruction and guides dives throughout the world, including the Arctic. 


Nathalie pursues better understanding of our planet through documentation and shares her concern for our fresh water resources through her films, articles in international magazines, and event lectures. Her drive is to bring people together and empower them through better relations with their own environment ultimately for a higher quality of life.



Nathalie has led and participated on cave and wreck documentation projects in eight countries (France, Canada, United States, Iceland, Mexico, China, Australia, and Hungary), and regularly organises small group diving expeditions for surveying, filming, 360 degree photography and other missions through her non-profit organisation Aqua Sub Terra Exploration (ASTEX) (

Nathalie Lasselin is presenting at OZTek Advanced Diving Conference


Nathalie Lasselin, adventurer & explorer, is presenting at OZTek Advanced Diving Conference 


In 2011 Nathalie founded Aqua Sub Terra Exploration (ASTEX), a non-profit organisation promoting positive action toward karst resources. She filled the lack of such an organisation in Canada, and in France. The group takes part in environmental marches and other actions. ASTEX’s website is and a video of the organisation’s work can be found at


In 2015, and again in 2016, Nathalie organised women in her home Providence of Quebec, Canada to set a World Record. By creating the empowering event Femmes a la Mer, World Records for simultaneous immersion of the largest number of female divers and free divers were set and broken during both events. 

Nathalie rallied 129 women in 2015 and 149 women in 2016, to join her for the successful record-breaking attempts. At the 2016 event, Nathalie honoured the owner of Morrison’s Quarry, Madame Evelyne Morrison, for her 30 years of support to the diving community ( All profits from the events were given to The Women’s Centre of Montreal, a non-profit organisation providing educational and vocational training (, and to the Greenland Shark Research Centre (GEERG) (


Through Nathalie’s new project, Urban Water Odyssey (UWO), on August 14, 2017, Nathalie successfully completed an underwater half marathon dive in the St. Lawrence River ( This was the first step of a larger initiative to bring awareness and action to the plight of fresh drinking water in cities. 

The dive took six hours and was covered in the general media. This event engaged citizens to improve their relation with the river, the source of their tap water. Nathalie diligently trained in order to accomplish this dive and used her platform to serve as an example of determination and problem solving necessary for environmental challenges that await us. 


In September 2018, Nathalie travelled 70 km from one end of the island of Montreal to the other to continue to raise awareness.  She did it in 2 days in 2 dives of more than 15 hours each. 


Nathalie Lasselin is presenting at OZTek Advanced Diving Conference