Introduction

Coral reefs are highly productive marine ecosystems supporting marine biodiversity, fisheries and coastal protection. Increasing marine heatwaves and frequent bleaching are threatening their survival.

Major Causes

• Marine heatwaves: Thermal stress → expulsion of zooxanthellae → coral bleaching and mortality.
• Ocean acidification: Reduced carbonate availability → weaker CaCO₃ skeleton formation.
• Pollution: Sewage, agricultural runoff and sedimentation damage reef health.
• Destructive activities: Bottom trawling, dredging, coastal construction and tourism.
• Climate change: Frequent bleaching → shorter recovery periods → reduced coral resilience.
• Algal takeover: Coral death → macroalgal dominance → inhibits reef regeneration.

Way Forward

• Global emission cuts → limit warming and marine heat stress.
• Expand effectively managed Marine Protected Areas (MPAs) under the 30×30 target.
• Promote coral nurseries, larval propagation and heat-resilient corals.
• Control coastal pollution and destructive fishing.
• Restore mangroves + seagrasses as natural buffers.
• Strengthen satellite monitoring + early-warning systems for marine heatwaves.

Conclusion

Coral resilience → climate action + local conservation + scientific restoration, essential for protecting marine biodiversity and coastal livelihoods.