Black Sea is one of the most isolated inland seas in the world. The marine ecosystem is highly fragile due to its isolation and many species are in bad conservation status. Different pressures and threats affect the Black Sea negatively: over fishing, pollution and introduction of invasive alien species, climate change, etc. BLACK SEA WATCH PROJECT is a joint initiative of Green Balkans NGO, Bulgaria and TUDAV Foundation, Turkey aiming to raise public awareness on biodiversity of the Black Sea and what a fragile ecosystem it is. The developed tools – mobile app for smart phones and website – intend to raise knowledge about the flora and fauna inhabiting the Black Sea and to promote development of “citizen science” in the region. By collecting and submitting findings you can contribute to study of the occurrence and distribution of species in the Black Sea thus creating sound scientific basis for proposal of relevant conservation measures.