Sustainability in fisheries combines theoretical disciplines, such as population dynamics of fisheries, with practical strategies which include avoiding overfishing. Techniques which support kind of sustainability are individual fishing quotas, curtailing destructive and illegal fishing practices. The main goal is to set up protected areas, restore collapsed fisheries, incorporate all externalities involved in harvesting marine ecosystems into fishery economics and educate stakeholders together with the wider public. Plastic pollution destroys aquatic and marine life, additionally jeopardizing its sustainability. Creating Certified Safe Marine Areas, plastic-free zones, we are helping to reduce the plastic pollution, as well as its entering into the human food chain.