Our Changing World - Sushi Seaweed

Whether it's delicate pink filaments or large brown leathery straps, seaweeds in all their forms and colours are a feature of our rocky coastline. And no one knows more about New Zealand seaweeds than NIWA's Wendy Nelson. Wendy is a phycologist - someone who studies algae, and Alison Ballance joins her on a collecting trip to Wellington's South Coast to find out more about these marine plants.