Energy production based on fossil fuels is the main reason for global warming. Many countries have begun switching fossil fuels with renewable energies, reducing the effects of climate change. A tremendous potential in future energy needs plays the Marine Renewable Energies (MRE). The MRE industry should take into consideration the potential environmental effects and if it poses any risks to marine animals, surrounding habitats or ecosystem processes. This research provides some insights regarding the MRE development and points out the potential environmental effects of implementing them and finally, draws some lines regarding the ecological effects of the MRE extraction from the Black Sea.