Mati City — Microplastic pollution is no longer just a marine waste issue. A new study has revealed that these tiny plastic particles have already entered the bodies of edible sea cucumbers, raising concerns for food safety and marine ecosystem health.
The study, conducted by Errole A. Maxey, Alezandra Ramille A. Cadayona, and Dj Mar M. Longyapon from Davao Oriental State University and published in 2026, found microplastic contamination in Holothuria scabra, a commercially valuable sea cucumber species widely consumed across Asia.
Researchers examined 90 sea cucumber individuals collected from three coastal sites in Pujada Bay, Philippines. Results showed that 35 individuals, or 38.88 percent, contained microplastics in their digestive systems.
In total, 36 microplastic particles were recovered, averaging 0.4 particles per individual. While the number may appear low, scientists say it confirms that plastic contamination has already reached benthic ecosystems, where sea cucumbers feed and live.
The majority of the recovered particles were fibers, accounting for 75 percent of the total. These thread-like particles are often linked to fishing ropes, synthetic nets, and textile waste.
Blue-colored particles dominated the findings, making up 61.11 percent of all detected microplastics. According to the researchers, these likely originate from fishing gear such as nylon ropes and lines, which are common in coastal activities.
Chemical analysis using FTIR technology revealed that synthetic rubber was the most common polymer, accounting for 66.67 percent. This suggests pollution sources may extend beyond household plastics to include tire abrasion, industrial materials, and urban runoff.
The researchers explain that Holothuria scabra is highly vulnerable to microplastic exposure because of its feeding behavior. As a deposit-feeder, it constantly ingests sediment while searching for organic matter, making it highly exposed to plastic particles trapped in the seabed.
This feeding behavior also makes the species a potential natural bioindicator of sediment-based microplastic pollution. In other words, the amount of plastic found inside sea cucumbers can reflect the level of contamination in their environment.
The findings also raise new food safety concerns. Sea cucumbers are considered a luxury seafood product in many Asian countries. Continued microplastic accumulation could increase the likelihood of these particles entering the human food chain.
Scientists warn that microplastics can also carry toxic substances such as heavy metals and organic pollutants attached to their surfaces. These contaminants may affect marine organisms and potentially impact human health.
The study highlights that even protected marine areas like Pujada Bay are not immune to plastic pollution. Coastal activities, fishing operations, household waste, and land-based transport systems all contribute to the contamination.
Researchers emphasize the urgent need for stricter plastic waste management, especially in coastal communities. Reducing plastic leakage, improving waste systems, and raising public awareness are considered critical steps.
For science, the study provides important baseline data on microplastic contamination in benthic marine species. For the public, it serves as a reminder that plastic pollution is no longer distant—it may already be part of the seafood we eat.
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