Also known as Bullseye, Curved Bullseye, Hatchet Fish, Silver Sweeper, Vanikoro Sweeper.
Found in schools, during the day in caves, crevices and under ledges, dispersing at night to feed high above the bottom of reefs.
They feed nocturnaly on zooplankton.
Length - 17cm
Depth - 0-20m
Sweepers school during the day, but at night they float high above the bottom to hunt for larger zooplankton.
Several species are triangular shaped. Ref: https://www.fishbase.in/summary/Pempheris-adusta.html