I am a marine and environmental scientist with expertise in marine biology, aquatic ecology, and ecotoxicology, focusing on the impacts of anthropogenic activities on aquatic ecosystems. I hold a PhD in Marine Biology, MSc in Marine Pollution and Management and a B.Tech in Biological Sciences (Hydrobiology). My research interests include aquatic pollution (including and not limited to heavy metals, hydrocarbons, PAHs, and microplastics), sediment–water–biota interactions, bioaccumulation, ecological risk assessment, and biomonitoring of coastal and estuarine systems. I have worked on microplastics, ballast water quality, oil-contaminated environments, and PAH impacts in sediments, mangroves, and benthic organisms, including molecular and biochemical responses. My methodological expertise includes field sampling, laboratory analysis, and environmental data analysis, supporting evidence-based management of aquatic ecosystems. Dr Amarachi is a member of the Institute of Marine Engineering, Science and Technology, Deep-Ocean Stewardship Initiative, the Nigerian Environmental Society and was recently recognised by the Royal Society UK as a Global Talent in Environmental Science.