The Great Barrier Reef, one of the world’s most iconic natural wonders, is under siege—and the culprit is a spiky, venomous predator: the Crown-of-thorns starfish (COTS). But here’s where it gets controversial: while some see these starfish as a natural part of the reef ecosystem, their unchecked outbreaks can decimate coral populations, leaving behind a trail of destruction. So, how do we strike a balance? Enter the COTS Control Program, a bold initiative led by the Great Barrier Reef Marine Park Authority, which has been tirelessly working since 2012 to protect this fragile ecosystem.
This program isn’t just about reacting to outbreaks—it’s about staying one step ahead. Using targeted surveillance, manual culling, and cutting-edge tools like underwater monitoring and eDNA technology, the program focuses on high-value reefs most at risk. And this is the part most people miss: since its inception, the program has culled nearly 1.4 million COTS, safeguarded coral across approximately 1 million hectares of reef habitat, and invested over 150,000 diver hours into surveillance and control efforts. That’s right—divers are on the front lines, battling these starfish one by one.
The COTS Control and Innovation Program (CCIP) takes this a step further by integrating the latest scientific research to enhance detection and response strategies. A groundbreaking 2024 study revealed that regions with timely and sufficient control efforts saw starfish populations drop by up to six times and coral coverage increase by 44%. But here’s the question: Is this enough to combat the growing threats to the reef, including climate change?
Managing COTS outbreaks isn’t just about saving coral—it’s about bolstering the reef’s resilience against broader environmental pressures. Australia’s approach is widely recognized as world-leading, helping to preserve the Outstanding Universal Value of this UNESCO World Heritage Site. Yet, as the reef faces unprecedented challenges, we must ask: Are we doing enough? And what role should technology, policy, and public awareness play in this fight?
What do you think? Is the current approach to COTS control sufficient, or do we need bolder, more innovative solutions? Share your thoughts in the comments—let’s spark a conversation that could shape the future of the Great Barrier Reef.
