New Zealand records largest ever bleaching of sea sponges

Researchers say tens of millions of sponges may have been affected by protracted marine heatwave

New Zealand is experiencing the largest bleaching of sea sponges ever recorded, scientists say, after extreme ocean temperatures turned millions of the aquatic creatures white.

The discovery comes after researchers raised the alarm in May, when sea sponges off New Zealand’s southern coastline were found bleached for the first time.

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