Simbang shows some of the tengadak available at his stall. KAPIT (June 7): The ‘tengadak’ season is back at Terasang Market here, much to the joy of the local fishmongers. The Barbonymus schwanenfeldii, which belongs to the carp family (Cyprinidae),is one of the most popular river fish in Kapit. They are usually in abundance in January – around the Chinese New Year season, as well as in April and June.