The Circular Ocean Eco-innovation Guide provides a practical introduction to the Eco-innovation and Circular Economy (CE) potential for transforming used fishing nets, ropes and components (FNRC’s) into valuable second-life products and services. The guide overviews the emerging business opportunities that Eco-innovation has to offer start-ups, entrepreneurs and SMEs interested in exploring the potential of developing products or services from used FNRC’s, ranging from re-use, repair or re-purposing to crafting products utilising 3D printing or injection moulding technologies.