The Redtoothed triggerfish or Niger trigger, Odonus niger, is a triggerfish of the tropical Indo-Pacific area, the sole member of its genus.
The Redtoothed triggerfish is a dark blue bodied fish, ranging up to 50 cm in length. The fins are all blue-green in color, having yellow and light blue trim. It has a lyre shaped caudal fin with a yellow bar between the lobes. Like all triggerfish Redtoothed triggers have a retractable dorsal spine. The dorsal and anal fins give them the ability to swim backwards, which is an advantage if you feed of coral and have to maneuver in narrow spots.
It inhabits open waters and current-swept seaward reefs between 0-115 ft (0-35 m) and can often be seen in groups turning and circling just under the sea surface while feeding on plankton brought in by the current. Sponges are another part of their menu.