Australia Day 2000 saw PADI Career Development Centre, Pro Dive Cairns, run a highly successful Crown of Thorns, (COTs) control programme on The Great Barrier Reef.
Pro Diveâs luxury liveaboard vessel Scubapro was donated for the event and 12 volunteers travelled to Flynn Reef for a series of night and early morning dives intended to minimise the impact the COTs have on the reef. Trained divers entered the water equipped with spot guns and injected solutions of sodium bisulphate into each starfish. This is the humane and quickest method of controlling the COTs numbers. It is also an environmentally sensitive method with the solution eventually breaking down in seawater to be completely benign.