Many thanks to Martin Gilbert (WCS- Cambodia Program) who managed the Cambodian stranding program from 2005--2007. Thanks to all the Cambodian staff and volunteers that assisted to collect samples and conduct necropsies, particularly Channa Phan, Lor Kim San, Phay Somany, Sean Kin and Department of Fisheries officers. Particular thanks to the Cambodian Department of Fisheries, especially His Excellency Nao Thouk (Director) for permission to research the Mekong dolphin population since 2001. Our deepest gratitude and thanks to all local villagers throughout the lower Mekong River for their generous hospitality, assistance with reporting and recovering numerous carcasses, and sharing their knowledge about the area and the Mekong dolphin population.

[^1]: **Competing Interests:**The authors have declared that no competing interests exist.

[^2]: Current address: Marine Mammal Research Program, Hawaii Institute of Marine‘Nims’ Purja is already way ahead of his predicted timeline to finish the 1st phase of ‘Project Possible’. According to the recent statistics, Nirmal climbed 3 eight-thousanders - Everest, Lhotse, and Makalu within 2 days 30 minutes (record achieved on 24th May, 2019), breaking his own previous record of 5 days 3 hours 35 minutes (record achieved on 1st June, 2017).

His Achievements in Spring 2019 (so far)

1. Summited Annapurna on 23rd April, 2019 at 3pm.

2. As a part of the rescue team, Nirmal rescued Malaysian mountaineer Wui Kin Chin, who was stranded on Annapurna during his descent from the summit.

3. Summited Dhaulagiri on 12th May, 2019 at 6:15pm.

4. Summited Kangchenjunga on 15th May, 2019 at 11:19am.

5. As a part of the rescue team, Nirmal tried to rescue Indian