The distribution of D.nigra has been reported as being quite extensive through most tropical and warm temperate regions including the central and western Pacific and Indian Ocean but excluding the Pacific and Atlantic coasts of tropical America (Willan and Coleman, 1984, Brodie et al., 1997). Brodie et al.’s (1997) study indicates that D.nigra is a tropical and subtropical species due to no confirmed specimens observed along Australia’s southern coastline. The southern limit of D.nigra’s distribution range in Australia includes regions south of Rottnest Island, on the west coast near Perth, and Botany Bay on the east coast (Figure 1).  D.nigra have previously been reported to occur all along the Australian coastline (Kenny, 1960, Burn, 1962, Willan and Coleman, 1984, Bryce and Wells, 1993), however these reporting’s most likely due to misidentifications of D.nigra as D.fumata.