Ratana lives with her family on a boat on the vast Tonle Sap lake in Cambodia – the largest freshwater lake in south-east Asia and home to a million people.
Many families here rely on fishing to earn a living. But fish stocks have fallen dramatically as a result of pollution, a warming climate and overfishing by commercial trawlers.
Now local communities are fighting back – with support from Save the Children.
And Ratana and her friends are leading the way.