Floating debris is a common scene from the lagoons to the sea around us. Beach cleaning and lagoon debris removing is leading nowhere as the disposal of garbage into the sea is increased.
Crown-of-Thorns (COT) is a natural coral eater and it eats so much the coral growth is threatened. Also the COTs population grows much faster than the coral growth. Therefore, removal of COTs every now and then to control its population is a regular activity.
Study the coral and its reef, the changes taking place in the coral reef environment is horrible.