ENVIRONMENTAL activists from the Coral Oasis Foundation monitor the coral reefs transplants planted using the bioreeftech method in 2019 at the Teupin Sirkui Beach, Iboih, Aceh, March 5. The foundation is collaborating with Rubiah Tirta Divers to carry out coral reef rehabilitation, aimed at protecting the marine ecosystem from degradation caused by human activity and global warming. ANTARA/Khalis Surry