Wanderlust World Wanderlust World Coral reefs—often called the “rainforests of the sea”—face a barrage of threats. Understanding them is the first step toward protection.
Rising ocean temperatures cause corals to expel their symbiotic algae (zooxanthellae), turning white. Prolonged bleaching leads to starvation and death.
Excess CO₂ lowers seawater pH, reducing carbonate ions needed for coral skeletons. Weaker structures are more vulnerable to erosion and storm damage.
Sewage, agricultural runoff (fertilizers, pesticides), and plastic waste smother reefs, trigger algal blooms, and introduce pathogens.
Removing herbivorous fish (parrotfish, surgeonfish) allows algae to overgrow corals. Blast fishing and cyanide use physically destroy reef frameworks.
Dredging, land reclamation, and construction increase sedimentation, blocking sunlight and burying coral polyps.
Warmer, stressed waters accelerate outbreaks of white syndrome, black band disease, and others, wiping out entire colonies.
Addressing these threats requires global emissions cuts, local fisheries management, pollution control, and marine protected areas.