Micro(nano)plastics in the fish gastrointestinal tract: A mini review and relevance to One Health perspective

Micro(nano)plastics (MNPs) research in the piscine gastrointestinal tract has been a significant area of study. Understanding the environmental presence of microplastics, their potential for both localised and systemic effects, and their role as a gateway for MNPs and associated chemicals to enter the tissues and the food web, including the human food chain, is crucial. The fish gut, as a critical intersection between environmental, biotic, and human health, aligns with the One Health concept. We review the likely uptake mechanisms and toxicological damage caused by ingesting MNPs and their associated chemicals in fish, contextualised within the realms of digestive physiology and biological plausibility.