Microplastics are tiny fragments of plastic defined as being less than 0.2 inches in diameter.

"75% of fish that I sampled had ingested microplastic. I sampled fish over a two-year period, throughout all seasons, along the south-east coastline of southern Aotearoa (New Zealand), from Oamaru to Te Waewae Bay," coastal scientist and lead author of the study, Isabella Clere, told Newsweek.