The Tethys Research Institute (official name: Istituto Tethys ONLUS) is a non-profit research organisation founded in 1986 to support marine conservation through science and public awareness. The institute has its headquarters at the Civic Aquarium of Milan, Italy. Tethys' activities are mainly carried out in the Mediterranean Sea, although research programmes have been conducted also in the Black Sea, the North Atlantic Ocean, the Caribbean as well as in the Red Sea and Antarctica. The results of these activities have been presented in scientific publications as well as in meetings, workshops and conferences.