A decade after a mysterious epidemic wiped out 99 % of California’s sunflower sea stars, a hidden colony has been found. The breakthrough could revive dying kelp forests and teach marine conservation worldwide.

The Great Marine Collapse: From Epidemic to Ecosystem Failure

In 2013 a massive marine heatwave slammed the northeast Pacific. At the same time Vibrio pectenicida sparked “sea star wasting disease,” carving lesions into the bodies of Pycnopodia helianthoides (sunflower sea stars) and killing roughly 57.5 billion individuals across 20 species.

Sunflower sea stars sat at the top of the near-shore food chain. When they vanished, purple sea urchins ran rampant, stripping kelp forests bare. By 2017, El Niño-driven warming had erased more than 90 % of kelp in several West Coast regions.

The Discovery of the Hidden ‘Seasquatch’ Lair

Researchers from Sonoma State University, the University of British Columbia and the Hakai Institute finally changed the story. In June 2025 research technician Rachael Karm spotted an odd cluster of sea-star arms while surveying a protected stretch of coastline. Subsequent dives confirmed a colony of 18 sunflower sea stars—the largest and southernmost group recorded since the 2013 crash.

The colony includes adults and juveniles, a sign that it may be reproducing. The find prompted a rapid response: a “dream team” of 25 scientific divers from UC Berkeley, The Nature Conservancy and other institutions rushed to the site to assess and plan next steps.

Why Kelp Forests Matter for the Global Climate

Kelp forests do more than look pretty. They:

  • Host biodiversity – Grey whales, rockfish, abalone and crabs all rely on kelp habitats.
  • Pull carbon from the air – Kelp captures CO₂ at rates that rival many terrestrial forests, storing carbon in its tissue and, when it dies, in the deep ocean.
  • Support economies – Commercial fisheries and coastal tourism depend on the rich life kelp shelters.

What It Means for India

India’s coastline faces the same warming trends that sparked the Pacific epidemic. The discovery offers three clear lessons:

  1. Watch for temperature-driven pathogens – Rising sea-surface temperatures can trigger bacterial outbreaks that collapse food webs. Early-warning monitoring is essential.
  2. Protect keystone predators – Safeguarding species that keep herbivore populations in check stabilizes fisheries, coral reefs and seagrass meadows.
  3. Invest in blue-carbon – Integrating kelp and other macroalgae into climate plans can cut emissions while creating new livelihoods.

Scientists have located a surviving colony of sunflower sea stars off the West Coast, the first such group found since the 2013 epidemic wiped out 99 % of the species in California. The 18-animal colony could become a keystone for reviving kelp forests that now cover less than a tenth of their former extent, a development that matters to fisheries, climate mitigation and coastal economies worldwide.

The 2013 Collapse

A 2013 heatwave paired with Vibrio pectenicida devastated sea-star populations, killing roughly 57.5 billion individuals across 20 species. Sunflower sea stars kept purple sea urchins in check. Their loss let urchins graze kelp to the rock, wiping out over 90 % of kelp in several West Coast regions by 2017.

A Hidden Lair Emerges

June 2025 brought a surprise. While surveying a protected coastline, Rachael Karm spotted an unusual cluster of sea-star arms. Dives confirmed a colony of 18 sunflower sea stars, the largest and most southerly group documented since the 2013 crash. The mix of mature stars and juveniles hints at reproduction. A rapid response team of 25 scientific divers from Sonoma State, UBC, Hakai, UC Berkeley and The Nature Conservancy assembled to evaluate the site and plan next steps.

Why Sunflower Sea Stars Matter

  • Predators of purple sea urchins – Their feeding stops urchins from overgrazing kelp.
  • Support kelp-dependent species – Healthy kelp shelters grey whales, rockfish, abalone and crabs.
  • Carbon sinks – Kelp absorbs CO₂ at rates that rival terrestrial forests, storing carbon in biomass and the deep sea.
  • Economic engines – Fisheries and tourism rely on the biodiversity kelp habitats sustain.

Tanpa tekanan pemangsa ini, landak laut akan mengubah padang kelp menjadi "padang landak laut" yang gersang, satu peralihan yang sukar untuk diubah semula. Memulihkan walaupun sejumlah kecil bintang laut matahari boleh mengembalikan keseimbangan ke arah pertumbuhan kelp.

Pertaruhan untuk Iklim dan Ekonomi

Hutan kelp menyerap karbon dengan cepat, mengurangkan gas rumah hijau di atmosfera. Kehilangannya bermakna terlepasnya peluang mitigasi iklim. Membina semula kelp boleh merangsang ekonomi pesisir pantai yang bergantung kepada stok ikan dan ekopelancongan, sekali gus mewujudkan pekerjaan dalam bidang pemulihan, pemantauan dan penuaian mampan.

Pengajaran untuk Ekonomi Biru India

Garis pantai India yang luas menghadapi trend pemanasan dan risiko penyakit yang serupa. Penemuan di Pantai Barat ini menawarkan tiga pengajaran penting:

  1. Amaran awal untuk patogen yang didorong oleh suhu – Peningkatan suhu permukaan laut boleh mencetuskan wabak bakteria yang menular melalui rangkaian makanan marin. Program pemantauan mesti mengesan isyarat sedemikian sebelum ekosistem runtuh.
  2. Perlindungan spesies teras – Melindungi pemangsa yang mengawal populasi herbivor adalah penting untuk kestabilan perikanan, terumbu karang dan padang rumput laut yang menyokong "Ekonomi Biru" India.
  3. Penyelesaian karbon berasaskan alam semula jadi – Kelp dan makroalga marin yang lain boleh disepadukan ke dalam strategi iklim negara sebagai aset "karbon biru", yang menyediakan pengurangan emisi dan kepelbagaian mata pencarian.

Cabaran di Hadapan

Saiz koloni ini adalah kecil; 18 individu mewakili kolam genetik yang rapuh.

Apa yang Perlu Diperhatikan

  • Pemantauan jangka panjang – Pemeriksaan kesihatan secara berkala terhadap koloni dan populasi landak laut di sekitarnya akan mendedahkan sama ada tekanan pemangsaan sedang dibina semula.

Bintang laut matahari yang tersembunyi ini menawarkan peluang yang nyata, walaupun rapuh, untuk memulihkan kemerosotan marin yang telah berlarutan selama sedekad. Kelangsungan hidup mereka bergantung kepada sains dan dasar yang pantas serta terkoordinasi; jika penyelarasan itu berlaku, hutan kelp—serta iklim, keselamatan makanan dan ekonomi yang bergantung kepadanya—boleh mula pulih semula.