it would create lots of new jobs. >> and here they are -- the mekong's irrawaddy dolphins. eir snoutless heads look more like those of whales than dolphins. and they don't jump. visitors shouldn't expect them to put on a show, like flipper. they live on crustaceans, but are happy to get a morsel of fish as our guide shows us. and fortunately for their fans, the aquatic mammals have to surface regularly to breathe. >> it's incredible. there aren't many places where you can see animals like these. they're really near the boat. they're hard to photograph because they move so fast. it's a bit of a game for them. but it's a great opportunity to see them up close. >> quite a way downriver, on cambodia's border to laos, there's a second conservation area. there are said to be four irrawaddy dolphins here. river guards regularly patrol the area. the worldwide fund for nature supplies them with fuel and a gps device. the guards are delegated by the surrounding villages and fishing community. their job is to enforce the protection of the dolphins, especially against the illegal method