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Microplastic ingestion by fish from beaches with different characteristics in a tropical bay
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Researchers studying fish in a tropical bay found that 1 in 5 fish had microplastics in their stomachs, and this happened across all species, sizes, and locations, including areas far from big cities. Even fish-eating predators (which many humans also eat) showed contamination, suggesting plastic pollution is now baked into the food web from top to bottom. Since some of these fish end up on dinner plates, this study is a reminder that microplastic exposure through seafood may be more widespread than we think, and more research is needed to understand what that means for our health.
This study aimed to identify and quantify microplastic ingestion by fish species in four sites in Todos os Santos Bay (TSB), two beaches with estuarine characteristics and two beaches exposed to the open sea. The gastrointestinal contents of 1,339 individuals (19 species) were analyzed, and 20.01% of the specimens were contaminated. Four trophic guilds were defined: generalists, zooplanktivores, zoobenthivores, and piscivores. Microplastics were present in all trophic guilds, with higher ingestion in piscivorous species. Ingestion occurred in all species, regardless of specimen size, weight, location, or time of year. Our results highlight that microplastic contamination in TSB is widespread, even in less populated areas and species of different trophic guilds. This increases the need for complementary studies to determine the specific composition of microplastics, potential sources of contamination, as well as to determine mitigation measures directed at microplastic pollution in coastal ecosystems.
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Microplastics ingestion by fish in the Pangandaran Bay, Indonesia
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Researchers examined the digestive tracts of 18 fish from Pangandaran Bay, Indonesia, finding 193 microplastic particles across two species — predominantly fragments (50%) and films (27%) — and providing the first documented evidence of microplastic contamination in fish from that coastal region.
Microplastic Ingestion by Fish with Different Feeding Habits from Different Habitats in a Typical Semi-Enclosed Haizhou Bay
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A study of eight fish species in China's Haizhou Bay found microplastic detection rates of 53–80% across species, with benthic and omnivorous fish accumulating significantly more MPs than pelagic or predatory fish, and PET, polyamide, and polystyrene linked to marine aquaculture and port construction. Feeding behavior and habitat depth are key determinants of MP accumulation, with bottom-dwelling fish consuming prey that carries greater plastic loads from contaminated sediment layers.
Microplastic in fish – A global synthesis
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A global synthesis of microplastic ingestion data from marine, freshwater, and estuarine fish found that 49% of sampled fish worldwide had ingested plastic, averaging 3.5 pieces per fish, with freshwater fish and those from aquaculture sources showing higher ingestion rates than wild marine fish. This comprehensive analysis reveals that microplastic contamination of fish — a primary human protein source globally — is now the rule rather than the exception, underscoring urgent risks to food safety.
Microplastic ingestion and potential risk assessment on commercial and non-commercial marine fish in the Bay of Bengal
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Researchers analyzed microplastic contamination in six coral reef fish species from Saint Martin's Island in the Bay of Bengal, finding 100% occurrence rates, with 4-10 microplastics per gastrointestinal tract dominated by polypropylene and polyethylene fibers, and polymer hazard index scores classifying all species in the high-risk 'Danger' category.
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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.