SCI & TECH● LOWSep 16 · Sep 16, 2026, 1:31 PM
In 2013, millions of purple sea urchins began to be removed from barren reefs; seven years later, more than 55 acres of kelp forest had recovered
Clarín · north america
The disappearance of predators and a marine heatwave had turned extensive areas of the California coast into purple urchin-dominated grounds.
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