The project embraces the goal 14 of the “Agenda 2030'': conserve and sustainably use the oceans, seas and marine resources for sustainable development. Covering about 70% of the earth’s surface, our seas supply half the oxygen we breathe, and provide food and livelihoods for more than a billion people. Marine plastic pollution and its effects on life below water have recently been brought to our attention. The issue of plastic pollution is now accepted to be a global issue that urgently need to be addressed. Critical thinking and creativity can tackle the plastic pollution. The degradation of marine ecosystems reinforces the importance of education for sustainability. Etwinners from different countries will discover more about their seas and oceans.