The Niger Triggers exact colour varies in this species of fish, and can also change from day to day between purple, blue and blue/green with a striking, lighter blue highlight on the fins and long tail lobes. The colour temperature of the lighting also plays a role in the colouration of any fish in the home aquarium. As an adult, they acquire bright red teeth, and are normally dark purple in colour with a blue/green highlight around their face making them quite interesting to watch when they eat.
They can vocalizes using a "grunting" sound. They are a great active fish for the more aggressive, fish-only display.
An aquarium with rocks and caves provides a good habitat for the Niger Trigger, however, it will tend to rearrange the landscaping and rocks.
They are generally Reef Safe and should not harm any corals, however they may nip at sponges, tunicates, crustaceans and snails.
The Niger Trigger needs a varied diet of meaty foods including; squid, krill, clams, small fish and hard shelled shrimp to help wear down their ever growing teeth.