The Hawai`i Institute of Marine Biology (HIMB) is a marine biology laboratory located on the state-owned Coconut Island in Kāne'ohe Bay. Coconut Island is approximately 29 acres (120,000 m²), including 6 acres (24,000 m²) of enclosed lagoons used to keep organisms being studied in captivity. Surrounding it are 64 acres (260,000 m²) of coral reef, designated by the state of Hawai‘i as the Hawai‘i Marine Laboratory Refuge. It is part of the University of Hawaii at Manoa.