Researchers Identified Nine New Alaska Sea Sponges

Scientists found the new species in the Aleutian Islands and the Gulf of Alaska at depths up to 500 meters.

Updated on Oct. 9, 2026 in Environmental

Isometric editorial illustration showing a detailed, porous sea sponge structure on a textured seafloor plinth, representing deep-sea marine habitat discovery. — Researchers in Alaska have identified nine new species of deep-sea sponges, highlighting the need to protect vulnerable seafloor habitats from commercial fishing. AI Illustration. Upload story photo >

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Scientists have identified nine previously unknown species of sea sponges in Alaskan waters, bringing the state's total number of known species to 232. These discoveries come amid ongoing environmental concerns regarding the impact of commercial bottom trawling on seafloor habitats.

Why it matters

Sponges play a vital role in marine ecosystems by providing essential nurseries for fish and offering protection from predators. Protecting these habitats is a central point of contention for regulators overseeing the state's commercial fishing industry.

Researchers used microscopic examination of spicules and DNA testing to verify the new sponges, which were found at depths between 50 and 500 meters. The findings include the identification of the new genus Polycapus rubrum and species Julavis borealis.

The players

North Pacific Fishery Management Council

This regional body is responsible for the conservation and management of fisheries in the federal waters off the coast of Alaska.

The details

Environmental groups have reported 8.8 million pounds of sponge bycatch resulting from bottom trawling operations between 2005 and 2025. These concerns are currently being weighed against the economic interests of the fishing fleet as regulatory discussions continue.

Samples were collected during trawl surveys from 1997 to 2022.
Bottom trawl fleets recorded bycatch figures between 2005 and 2025.
Aleutian coral and sponge gardens received protection status in 2006.
The North Pacific Fishery Management Council met in Anchorage in October 2026.
Staff will present options to mitigate gear contact in May 2027.

The Big Picture

The identification of these species complicates the existing management framework established by the 2006 Aleutian coral and sponge gardens protection status. It underscores a growing need to update conservation strategies to account for previously unidentified seafloor biodiversity.

These findings could influence future fishing regulations, potentially impacting the operational costs and catch limits for the commercial fishing industry. The scientific classification also provides baseline data that helps conservationists advocate for more rigorous protections of seafloor environments.

The takeaway

The discovery of new species highlights how much remains unknown about the deep-sea habitats off the coast of Alaska. Conservation advocates and industry leaders continue to search for a balance between sustainable fishing practices and the preservation of fragile marine ecosystems.

What happens next

The North Pacific Fishery Management Council is scheduled to have staff present options for preventing trawl gear contact with the seafloor in May 2027.