Sea cucumbers, small marine animals found on the ocean bed, are a prized delicacy in Chinese cuisine and fetch exorbitant prices.

Now, soaring demand for these creatures is fuelling a booming, multi-million-dollar illegal trade. But they play a crucial role in marine ecology, and now, in the global hotspot between India and Sri-Lanka, conservationists are waging war on the poachers.

From Series 9 of the award-winning series, Undercover Asia