Plastic pollution is a big problem, with small plastic particles called microplastics posing a threat to marine life. These tiny particles can enter the food chain through seafood consumption, harming freshwater and sea creatures. Microplastics can cause health issues like gut problems and increased toxicity in aquatic animals, which could also affect human health if consumed. Research on microplastics in seafood and freshwater environments is limited, but it's important to understand their impact on ecosystems and food supply chains. The study focuses on detecting and quantifying microplastics in aquatic animals and seawater from different sources worldwide. Recommendations for future research include improving identification methods and studying microplastics' effects on freshwater organisms.