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Deep-Sea Sponges Act as Natural Biofilters, Ingesting Microplastics in Ocean

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Discovery

Curated by Surfaced Editorial·Nature·2 min read
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A study published in *Marine Biology* by researchers from the University of Victoria has revealed that deep-sea sponges, particularly glass sponges, are actively ingesting and processing microplastic particles from surrounding waters. These ancient filter feeders were found to remove up to 30% of ambient microplastics in laboratory simulations, incorporating them into their tissues or expelling them as fecal matter. The research team collected deep-sea sponge specimens from the Canadian Pacific and exposed them to fluorescently tagged microplastics under controlled conditions. This discovery suggests a potential natural mechanism for mitigating microplastic pollution in the deep ocean.

Why It’s Fascinating

Experts are intrigued because deep-sea sponges, often considered passive filter feeders, demonstrate an unexpected capacity to interact with and process anthropogenic pollutants like microplastics, which were thought to persist indefinitely. This confirms the vital, yet often overlooked, role of benthic organisms in ecosystem health and challenges our understanding of deep-sea ecological resilience. Within 5-10 years, this insight could inspire biomimetic designs for filtering technologies, using sponge-like structures to remove microplastics from wastewater or even marine environments. Imagine giant, natural vacuum cleaners slowly purifying the ocean depths, piece by tiny piece. Marine ecologists, environmental engineers, and conservationists stand to benefit greatly. Do these sponges suffer any long-term health consequences from ingesting microplastics, or are they truly immune to their effects?

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