Molokini is a small, uninhabited islet located between the Hawaiian Islands of Maui and Kahoolawe. It is formed by a crescent-shaped, partially submerged volcanic crater roughly 0.4 miles (0.6 km) in diameter. A lush reef inside the Molokini Crater is home to about 250 species of fish, making it a popular destination for scuba divers and snorkelers.