The Silent Oceanic Pandemic: Global Sea Urchin Die-Off Threatens Marine Ecosystems
Sea urchins, particularly species in the Diadema genus, play a crucial role in maintaining the balance of marine ecosystems. These spiny creatures are key herbivores that graze on algae, preventing it from overgrowing and smothering coral reefs. Without them, reefs can shift from vibrant coral-dominated systems to barren, algae-choked landscapes. In recent years, a devastating pandemic has been silently sweeping through sea urchin populations across the globe. Starting in 2022, mass mortality events have decimated Diadema species in regions as diverse as the Caribbean, the Mediterranean, the Red Sea, the Indian Ocean, and the Canary Islands. Scientists describe it as a "silent ocean pandemic" because it unfolds beneath the waves, largely unseen until populations collapse. What is Happening to Sea Urchins? The affected sea urchins exhibit clear and heartbreaking symptoms. Infected individuals become lethargic, moving abnormally or not at all. They lose responsiveness to ...