Treshers is a dive shop and training centre in Staten Island, New York, operating from 186 Robin Road. The centre sells scuba diving, snorkelling, spearfishing and underwater photography equipment from major manufacturers, offers gear rental, tank servicing and air fills, and runs PADI scuba diving training and certification. Courses are available in English, Russian, Polish and Ukrainian for adults and children aged 8 and older. Dive trips are organised locally within the tri-state area and to international destinations.