Logo of Phnom Penh Post newspaper Phnom Penh Post - Big-name divers explore deepest Mekong pools in key fauna survey

Big-name divers explore deepest Mekong pools in key fauna survey

Content image - Phnom Penh Post
The group of underwater explorers dived about 75m below the surface of the Mekong River in Cambodia. WONDER OF MEKONG

Big-name divers explore deepest Mekong pools in key fauna survey

A group of well-known underwater explorers have dived to a depth of about 75m below the surface of the Mekong River in Cambodia, an important body of water that is the last habitat of the world’s largest freshwater fish.

The deepest exploration mission ever carried out in the Mekong is an international effort led by the US Agency for International Development (USAID) under the Wonders of the Mekong project, which began on April 23 and finished on April 27.

“We are exploring deep into the Mekong, another world – a realm within a hidden realm, a pitch-black space inhabited by rare and unusual fish like the Mekong giant stingray and giant catfish,” said Zeb Hogan, a fish biologist and leader of the USAID-funded project.

The area that the scientists will focus on is located just downstream of a Ramsar wetland of international importance. The region is dominated by flooded forests, rocky outcrops, sand bars, braided channels, deep pools and rapids and riffles. This area also is home to many of the Mekong’s more than 1,000 fish species, including the bizarre two-faced carp, giant goonch catfish, and the striped catfish, once a staple food in Cambodia.

Researchers believe that these areas are critically important as dry-season fish refuges and important spawning areas, and perhaps as the last habitat of several endangered giant fish. It is a region that is recognised as special and protected by local communities.

To study these important areas, Hogan – and project co-leader Sudeep Chandra – teamed up with biologists from the Fisheries Faculty of the Royal University of Agriculture; deep sea researcher Kakani Katija and her team from the Monterey Bay Aquarium Research Institute; and Kenny Broad, University of Miami professor, environmental scientist, cave diver, and the 2011 National Geographic Explorer of the Year. They are all specialists in the exploration and study of extreme underwater habitats.

In a press release seen by The Post on April 29, Hogan said: “The biggest challenge will be getting down to the bottom. Its deepest areas are below sea level. Besides being dark and silent, the waters could be obscured by particulates.”

For their exploration, the team used unmanned submersibles equipped with lights and cameras, drop cameras suspended on long cables, and use baited video cameras as their eyes and ears. To assess the foreign environment, equipment that measures depth and flow and maps the river bottom and currents were deployed.

The team’s basecamp are adjacent to one of the Cambodian Mekong’s deepest pools and a fish reserve designed to protect spawning fish. The area itself is dotted with islands occupied by small fishing camps, nomadic fishers that move from island to island, season to season. Upstream, across the border in Laos, is Khone Falls, the Mekong’s only main channel waterfall.

Hogan said that these deep pools may even have the potential of being used as introduction sites for endangered fish, similar to what the Wonders of the Mekong team did last month in the Tonle Sap Lake.

Chea Seila, programme manager for Wonders of the Mekong, said in the press release: “This is one of many Wonders of the Mekong projects that seeks to protect a healthy, connected river, and the people, fisheries, wildlife, and water quality that the river supports.”

Chhut Chheana, communications coordinator for USAID Wonders of the Mekong, told The Post on May 1: “The exploration was conducted in the Mekong Ramsar area, which is from Stung Treng provincial town to the Lao border.”

MOST VIEWED

  • First Cambodian woman graduates from Japan’s NDA military academy

    A few years ago, Meach Sithyka Jessica became the first-ever Cambodian woman to graduate from the US Military Academy at West Point, and since then her courage and determination has served as an inspiration for other Cambodian women. Similarly, Ly Chansocheata became the first Cambodian

  • Construction begins on $1.5B Kampot seaport

    The International Multi-Purpose Logistics and Port Centre, principally invested by Kampot Logistics and Port Co Ltd and projected to cost $1.5 billion, has officially broken ground in Bokor town, Kampot province. The multi-purpose logistics and port centre, located in Prek Tnaot commune, will be built on

  • Cambodia eyes key role in electronics, auto hubs in SEA

    Two roadmaps, part of the LDC’s economic diversification plan, were designed to see it through its migration process, but experts say the journey might be arduous, particularly in the presence of two established hubs in the region By 2028, Cambodia hopes to have exited the

  • Hun Neng, lawmaker and PM’s brother, passes away aged 72

    Hun Neng, chairman of the 4th Commission of the National Assembly, has passed away from heart disease at the age of 72 on the afternoon of May 5, according to the Ministry of Information. Hun Neng is the older brother of Prime Minister Hun Sen, and was

  • CCC team off on US business trip

    The Kingdom’s leading economists and private sector representatives have called on the US to renew its tax preferential status for Cambodian exports, as a Cambodia Chamber of Commerce (CCC) delegation departed for a weeklong business visit to the US, where they will meet with

  • PM meets with US business giants

    Prime Minister Hun Sen has met with a number of major US companies who have expressed interest in investing in Cambodia, in a meeting convened by the US-ASEAN Business Council (US-ABC). A delegation of companies – including Amazon, Meta, Chevron, ConocoPhillips, ExxonMobil, Ford, Visa and Pernod