Jetsetting Epicocity Project kayakers return from the Mekong River in Southeast Asia with another big fish story for the National Geographic.

A team from the Epicocity Project including Kyle Dickman, Trip Jennings and Andy Maser have just returned from the Khone Falls region of the mighty Mekong River on the border of Laos and Cambodia in Southeast Asia.

The expedition is the latest in a series sponsored by National Geographic that sees the multi-talented kayakers loading their boats with scientific equipment to collect data on the river ecosystems and resident fish populations. On the Mekong, the team rigged a Wave Sport Habitat with an advanced sonar mapping system and paddled several of the sprawling river's hundreds of channels to figure out where spawning fish are able to migrate.

Andy Maser writes on his Dagger blog:

This 11km wide section of waterfalls plunges 45 feet through a maze of vertical waterfalls, flumes and cascades—some runable, many terrifying. While descending the runable parts of the falls was part of our mission, finding the best way upstream was our ultimate goal.

This section of the Mekong is the largest inland fishery in the world. Billions of dollars of revenue are generated by the fishery and millions who live along the river depend on the more than 200 fish species for food. All this could come to an end though, if plans to construct a dam at the falls goes forward.

We teamed up with Zeb Hogan, Megafish expert and host of National Geographic Channel’s Monster Fish, to figure out what the impact of the dam would be on the fish population.