Record-Breaking Marine Heatwave Decimates Sponge Population in New Zealand

A 259-day marine heatwave in 2022 caused mass bleaching of over 50 million coral sponges along 1,000 kilometers of New Zealand’s Fiordland coastline. Follow-up surveys nearly a year later showed that almost 50% of the sponges at sampling sites had perished, marking this as not only the largest bleaching event but also the most significant …

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