Although nurdles are quite small, about the size of a lentil, over time they can fragment almost indefinitely.
At the size of a grain of sand, plastics are mistaken for planktonic food by animals lower down the food-chain. Once ingested microscopic plastic particles can pass straight into an animal's circulatory system and lodge in their tissues.
Unlike larger pieces of plastic like bottles, nets and bags there is no practical way of removing these microplastics from the sea.
Roll over the fragmenting nurdles to find out more...