Due to the current rate of plastic manufacturing and inadequate management of plastic waste, plastics have emerged as a significant challenge and environmental threat worldwide. Microplastics (MPs), defined as plastic particles smaller than 5 mm, have gained global attention due to their widespread distribution, bioavailability, and potential health implications for humans. The marine environment, being the ultimate destination for various contaminants, including MPs, poses a particular concern as seafood contaminated with MPs can cause health risks since seafood plays a significant role as a major protein source globally. The Gold Coast is popular as a vacation and surfing destination in Australia and is characterised by high population density. Therefore, this research study focused on determining the occurrence of MPs in five selected seafood species popular in local fish markets in the Gold Coast, Australia. This thesis comprises four chapters. Chapter 1 provides the study's background and underscores its significance. Chapter 2 presents a comprehensive literature review analysing previous research on MPs, highlighting their toxic effects on human health, aquatic fauna, and the broader aquatic ecosystem. Furthermore, Chapter 2 discusses recent studies relevant to the present investigation and methodological advancements in MP research, including laboratory analysis techniques and quality assurance/quality control (QA/QC) measures. Chapter 3 constitutes the primary component of the thesis, the research study titled "Occurrence of Microplastics in Five Fresh Seafood Species Sourced from the Gold Coast, Australia", while Chapter 4 offers a general discussion and conclusion. [...]