According to the researchers, 80 per cent of samples of seven popular fish sold near Marina may contain tiny specks of plastic. Fish sold at Pattinapakkam were detected with microplastics in the gills. The gut of Indian Mackerel, Greater Lizardfish, Humphead Snapper, Barracuda and Golden Snapper were between 1.93 mm and 2.03 mm in the form of fibres.