Niger Triggerfish - Odonus niger
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The Niger Triggerfish (Odonus niger) is a sleek, open-water triggerfish known for its deep blue to violet-black coloration and gracefully forked tail. Unlike many triggerfish, this species is more pelagic and less destructive, often cruising the water column rather than constantly rearranging rockwork. Its intelligence, bold personality, and striking appearance make it a popular choice for larger reef-compatible systems.
Common Name: Niger Triggerfish
Scientific Name: Odonus niger
Family: Balistidae
Size: Up to 18 inches (45 cm)
Temperament: Semi-aggressive
Difficulty: Moderate
Native Region: Indo-Pacific, including the Red Sea, East Africa, Indonesia, and the Great Barrier Reef, where it inhabits outer reef slopes and open water near drop-offs.
Reef Safe: With caution
Tank Size: Minimum of 180 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Open swimming space with sturdy rockwork; secure aquascape is essential due to size and strength.
• Behavior: More peaceful than many triggerfish but may become aggressive as it matures, especially toward smaller fish.
• Diet: Carnivorous—offer a varied diet of meaty frozen foods, shrimp, squid, clam, and high-quality pellets.
• Reef Compatibility: Generally safe with corals; may prey on small crustaceans and snails.
• Tankmates: Best kept with other large, confident fish such as tangs, angelfish, and larger wrasses.