A quarter of the fish from Auckland’s Hauraki Gulf, sampled as part of a new study,had microplastics in their guts, Stuff reveals. The discovery comes after experiments carried out by Masters students Devina Shetty and Veronica Rotman from the Joint Graduate School in Coastal and Marine Science. The study has been labelled as one of the first into how microplastics are affecting New Zealand’s fish species. Microplastics are pieces of plastic less than five millimetres long. They are either manufactured to be small or derived from larger plastics which have broken down into smaller pieces.