Researchers with the State of Hawai’i Division of Aquatic Resources (DAR) and the Hawai’i Institute of Marine Biology (HIMB) at the University of Hawai’i at Mānoa found a management approach that combining manual removal and outplanting native urchin was effective at reducing invasive, reef smothering macroalgae by 85% on a coral reef off O’ahu, Hawai’i.