The Doubleline Fusilier is a slender species that is usually seen swimming in schools well above the bottom.
The Doubleline Fusilier can usually be recognised by its colouration. During the day it is blue to green dorsally, white ventrally and has black caudal fin tips. At night the colouration changes to that seen in the lower image.
There are always two yellow stripes running along the sides of the body. The upper stripe runs from the nape to the caudal peduncle, following the dorsal body profile. The lower stripe follows the lateral line from the eye to the caudal fin base.
It is often listed in publications as P.diagramma (with an 'a' as the third letter). This spelling is incorrect.
It lives on coral reefs where it schools in midwater.
The species is recorded from Indonesia to New Caledonia and north to southern Japan. In Australia it occurs off central to north-western Western Australia and from northern Queensland to the central coast of New South Wales.
The map below shows the Australian distribution of the species based on public sightings and specimens in Australian Museums. Source: Atlas of Living Australia.
- Allen, G.R. 1997. Marine Fishes of Tropical Australia and South-east Asia. Western Australian Museum. Pp. 292.
- Allen, G.R. & R. Swainston. 1988. The Marine Fishes of north-western Australia. A Field Guide for Anglers and Divers. Western Australian Museum. Pp. 201.
- Carpenter, K. E. 1988. FAO species catalog. Vol. 8. Fusilier fishes of the World. An annotated and illustrated catalogue of caesionid species known to date. FAO Fish. Synop. No. 125: i-iv + 1-75.