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Occurrence of microdebris in commercial cephalopod
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Researchers found microdebris contamination — including plastic particles and natural fibers — in the digestive tracts of two commercial cephalopod species (squid and cuttlefish) sold at a market in Jakarta, Indonesia. The findings demonstrate that predatory cephalopods can accumulate plastic debris alongside prey, with implications for human microplastic exposure through seafood.
Abstract Modern Fish Market of Muara Baru is one of the largest fish markets in Jakarta, which sells various seafood, including fish, shellfish, crustaceans, and others. Previous studies have revealed microdebris contamination of mollusks, particularly in filter-feeders. However, it has not been widely studied at the predator level in cephalopods. We aim to investigate contamination of microdebris in two commercial species of cephalopod, i.e. Loliolus sumatrensis and Sepia recurvirostra , from the market. The digestive tract of the cephalopod was taken and dissolved by adding H2O2 50% then filtered under a vacuum system. The particles of microdebris were observed with a stereo microscope then several particles were analyzed using an FTIR microscope. The abundance of microdebris in L. sumatrensis was higher (3.8 particles/individual) than the abundance that of microdebris in S. recurvirostra (2.8 particles/individual). The size of microdebris was dominated by three of five size classes such as 0.1 − 0.5 mm, 0.5 − 1 mm, and 1 − 5 mm. Microdebris in L. sumatrensis was confirmed as polypropylene (PP), a synthetic polymer (microplastic), while in S. recurvirostra was confirmed as rayon (semi-synthetic). This research shows that microdebris contamination has reached the level of a predator in Mollusca.
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Researchers examined fish and shellfish sold for human consumption in markets in Indonesia and California and found anthropogenic debris, including microplastic fibers and fragments, in every species tested. Fish tended to contain debris in their gastrointestinal tracts, while shellfish, which are eaten whole, contained it in their edible tissues. The findings raise direct concerns about human exposure to microplastics and textile fibers through everyday seafood consumption.
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Researchers checked squid sold at a Philippine market and found tiny plastic particles—mostly fragments and fibers—in every single squid tested, hiding in both their gills and stomachs. This matters because squid is a popular seafood, and eating it may mean unknowingly consuming these plastic bits too; while scientists still need more research to confirm exactly what these particles are made of and how risky they are, this study adds to growing evidence that plastic pollution is working its way into our food.
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This Indonesian-language study examined microplastic contamination in the tentacles and digestive systems of squid from a fish landing site in Semarang, documenting the presence of microplastics in this commercially important seafood. The findings add to evidence that microplastic ingestion by cephalopods is occurring and may represent a pathway for human dietary exposure.
[Microplastics in the stomach and intestine of pelagic squid: A case study of Dosidicus gigas in open sea of Peru].
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Researchers found microplastics in the stomachs and intestines of jumbo squid (Dosidicus gigas) caught in the open sea of Peru, with fiber-shaped particles in blue or black dominating and similar contamination levels in both sexes. The study extends knowledge of microplastic ingestion to large pelagic cephalopods that support a major commercial fishery in the Eastern Pacific.
Understanding the interactions between cephalopods and marine litter: A research evaluation with identification of gaps and future perspectives
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Researchers reviewed the scientific literature on interactions between cephalopods (squid, octopus, and related species) and marine litter to evaluate impacts and identify knowledge gaps. The study found 30 papers documenting microplastic ingestion and synthetic microfiber transfer along food chains, but concluded that significant gaps remain in understanding how marine debris affects these ecologically and economically important animals.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.