Mokoliʻi, also known as Chinaman's Hat, is a basalt islet in Kāne'ohe Bay which was the main volcanic creator that formed Oahu.  The 12.5-acre islet was at one time part of a basaltic ridge before marine erosion separated it.  Mokoliʻi translates from Hawaiian as "little lizard." According to Hawaiian mythology, the island is the remains of a giant lizard's or dragon's tail that was chopped off and tossed into the ocean by the goddess Hiʻiaka. The common name of Chinaman's Hat derives from its likeness to the conical Asian hat. The Wedge-tailed Shearwater is the only species of bird that nests on Mokolii and 72 species of plants have been identified on the rocky pinnacle.