By Emmanuel Nduka Obisue
As global leaders convene at the COP30 climate summit in Brazil, a fresh scientific discovery from the western Indian Ocean is injecting cautious optimism into urgent calls to safeguard the world’s oceans.
An international research team working off the Comoros archipelago has returned with new evidence showing that, despite years of environmental strain, parts of the deep-sea ecosystem remain surprisingly resilient.
At depths between 300 and 900 metres, scientists recorded sightings of sharks, top predators whose presence suggests that food chains in those remote waters are still intact. For a country battling rising seas, overfishing, and warming oceans, the findings offer a rare glimmer of good news.
The observations were captured using baited cameras deployed from the vessel Angra Pequena, operated jointly by Comorian researchers and scientists from the ocean exploration group Nekton. The mission forms part of a wider effort to establish a biological baseline in deep waters that have scarcely been explored.
Dr. Nadjim Ahmed Mohamed, co-chief scientist on the mission, says such expeditions are essential for shaping global conservation goals.
“This research helps us understand areas that remain unknown,” he said. “With this knowledge, we can identify zones that need protection and work towards meeting the global goal of conserving 30% of the ocean by 2030,” he added.
While the deep sea shows signs of life, conditions closer to the coast are far more worrisome. Comoros’ Environment Minister, Abubakar Ben Mahmoud, warns that climate impacts are already altering daily life for residents.
“We’re facing enormous pressure from climate change. Sea levels are rising and pushing salt water into our farms and even our homes. Our coastlines and coral reefs are dying before our eyes,” he said.
This vulnerability is particularly frustrating for small island states like Comoros, which contribute little to global carbon emissions yet shoulder some of the harshest consequences. The World Bank estimates that more than 20% of Comorians live in poverty, and many depend directly on the ocean for food and income.
With declining fish stocks and increasing illegal fishing activity, conservation efforts must be paired with local education and stronger enforcement to ensure that coastal ecosystems remain productive for future generations.
Dr. Lucy Woodall, a co-leader of the Nekton expedition, notes that although shallow-water predators are becoming scarce, some coral communities still show remarkable vitality.
“We’ve seen some absolutely beautiful coral formations. They can provide essential habitats for fish that coastal communities rely on. It gives us hope—but it also highlights how urgently protection is needed,” she said. Experts stress that local efforts alone cannot achieve the global 30×30 target. Decisions taken at COP30, particularly by major emitters and maritime powers, will determine whether vulnerable regions like the Comoros can continue fighting biodiversity loss with any chance of success.
The scientific team hopes their findings will help guide policymakers on where to focus marine conservation measures before critical ecosystems collapse. With just five years left to meet the global ocean protection target, the window to act is rapidly closing.
But for now, the sight of sharks cruising through the deep waters of the Indian Ocean offers a reminder that nature, given a chance, can still endure
