Tri Nguyen Fish Lake is an an outdoor aquarium situated on Bong Nguyen Island, also called Hon Mieu Island, or Tri Nguyen Island, Nha Trang Bay; half an hour from Cau Da Port, Nha Trang City, Khanh Hoa Province. In fact, the 'aquarium' is an important fish-breeding farm, where over 40 species of fish, crustacean and other marine creatures are raised in three separate compartments.