Part 10/12:
Sea urchin farmer Quesamaru Son showcased a sustainable model where purple sea urchins are released into the sea to graze on kelp and seaweed, then harvested at maturity. His meticulous, trial-and-error approach exemplified how innovation can blend with traditional knowledge to restore degraded ecosystems—lessons that the Project Castaway team hopes to adapt.
Other Experiments and Future Directions
In Singapore, the team continued experiments with soil additives designed to extend plant drought tolerance, revealing the complexity of growing crops in harsh marine environments. Some crops showed resilience to dry conditions, such as pulaka, while others failed to germinate—highlighting the importance of selecting hardy species.