[4] It is native to Indonesia, the Solomon Islands, and Queensland in Australia.

[1] Males of this species are typical in colour for the genus, being bright powder blue on both the thorax and abdomen whereas females lack the pruinescence.

The labrum is brown to black, thus giving the species its common name of darkmouth, as opposed to the similar palemouth (Brachydiplax denticauda).

Though brightly coloured, the males often go unnoticed by an observer once they land on a lily pad or similar place.

[5] This species can be found in habitat with still and slow-moving waters.