The Tasman booby (Sula dactylatra tasmani) or Lord Howe masked booby is a large seabird of the gannet family, Sulidae, described from bones found on Norfolk and Lord Howe Islands in the Tasman Sea (van Tets et al. 1988). It was believed to have become extinct in the late 18th century or early 19th century on Lord Howe Island because of predation by visiting sailors, with the last sight record dating from 1788, when it was already extinct on Norfolk Island.