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Sea stars return to California after devastating die-off

A purple ochre sea star's leg disintegrates as it dies from sea star wasting syndrome. Photo: Elizabeth Cerny-Chipman / Oregon State University

In Southern California, sea stars may be staging a comeback after a mysterious disease devastated populations and species across the West Coast, per the Orange County Register. Scientists in southern California report seeing adult stars in tide pools for the first time in years.

Why it matters: Sea Star Wasting Syndrome causes the animals to melt and dissolve in just a matter of days before they die, limbless. Sea stars are considered a 'keystone species', which means they play a bigger role in supporting their ecosystem that other species. When they're removed from their environment, biodiversity drops rapidly.