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Updated: Jun 8, 2026
Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish
Published on: July 4, 2021
Microplastics in tropical freshwater carnivorous fish: edible tissue contamination and an exploratory Fillet Risk
Saraswathy Nalatambi1, Fauziah Shahul Hamid2
1Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Centre for Research in Waste Management, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Global College, Heriot Watt Malaysia, 62200, Putrajaya, Malaysia.
Microplastic contamination is present in edible fish tissues, posing risks to ecosystem health and food safety. This study highlights the need for comprehensive analysis of microplastics in fish fillets for accurate risk assessment.
Area of Science:
- Environmental Science
- Ecotoxicology
- Food Safety
Background:
- Microplastic contamination in freshwater fish is a growing concern.
- Edible tissue exposure remains poorly understood, impacting food safety and ecosystem health assessments.
Purpose of the Study:
- To investigate microplastic accumulation in tropical freshwater fish species.
- To characterise organ-specific distribution, edible fillet contamination, and particle properties.
- To assess the relevance of microplastic exposure for dietary risk.
Main Methods:
- Quantified microplastics in gills, stomach, intestine, and fillet tissues of three fish species.
- Classified microplastics by morphology (fibres, films, fragments, beads) and size.
- Utilised Raman spectroscopy for polymer identification and statistical analyses (PCA, PLI, FRS).
Main Results:
- Microplastics were detected in all analysed organs, including edible fillets.
- Smaller microplastic particles (<0.5 mm and <0.1 mm) were predominant.
- Identified polymers include polyethylene, polypropylene, polystyrene, PVC, polycarbonate, and PMMA, indicating diverse pollution sources.
Conclusions:
- Microplastic contamination extends into edible fish tissues, necessitating direct fillet analysis.
- Morphology-sensitive screening is crucial for comprehensive microplastic exposure assessment in freshwater fish.
- Findings provide a framework for evaluating microplastic risks in tropical freshwater food systems.
