The Tridacne Association was founded in Grottammare in 2000 in order to make discover the beauty of the Adriatic Sea and the Mediterranean, as well as the most famous seas like the Red Sea and the Indian Ocean. The Diving courses are taught by highly qualified IDEA Europe instructors. At the end of each course, after taking a final a test, a patent is released  and an international diploma with the national diploma of CSEN. The association also organizes several meetings, journeys and trips to wonderful places.