Various Whiptail Breams Pentapodus spp.

Whiptail Breams are part of the Threadfin Bream family native to the eastern Indian Ocean and the western Pacific. They are not closely related to the Seabream family but are nearer to the Snappers.

Papuan Whiptail Bream
Papuan Whiptail Bream
Above is believed to be the PAPUAN WHIPTAIL BREAM, Pentapodus numberii. It is endemic to the Bird's Head area off Papua, grows to some 16cm long and was discovered only around 2017. Its scientific name is after the then Indonesian Minister of Marine Affairs and Fisheries, a native Papuan and champion of marine conservation.
Northwest Threadfin Bream
Northwest Threadfin Bream
Above is the NORTHWEST THREADFIN BREAM, also called the FALSE WHIPTAIL, Pentapodus porosus, native to the coasts of northern Australia, the Aru Islands and southern Papua. They are generally more colourful than the light in my photo shows and they grow to a maximum of 27cm long.
Small-toothed Whiptail Bream
Small-toothed Whiptail Bream
This one is the SMALL-TOOTHED WHIPTAIL BREAM, Pentapodus caninus. It is native to sandy coasts and coral reefs of the South China Sea to New Caledonia in the western Pacific and grows to 35cm long. Juveniles are more colourful than the adult shown.