As global demand for seafood increases, many large fish species are being overexploited with anthropogenic pressures and environmental changes also beginning to affect the biology and sustainability of various marine species, including parasitic organisms. The black-spotted croaker (Protonibea diacanthus), is seriously over-sourced due to the high market price for swim bladders. Despite regulations, over-fishing continues with fishers now targeting aggregations and juveniles. This research will investigate the parasitism affecting the black-spotted croaker between different locations and time of year, and the population health implications affected. Results will provide essential information about species health and the relationship between parasitic burden and climate change, and will also contribute to the development of practices for the protection and sustainability of the species. The findings will be relevant to seafood customers worldwide and also to stakeholders such as fisheries authorities.