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Niger Triggerfish
Odonus niger
Animalia›Chordata›Actinopterygii›Tetraodontiformes›Balistidae
📍 Indo-Pacific
Despite the name, this stunning triggerfish is vivid purple-blue with a red beak-like jaw. One of the more peaceful triggers — less likely to attack tankmates, though not reef-safe. Active and visually striking in a FOWLR tank.
Care Guide
Diet
Niger Triggerfish are omnivores with a strong preference for meaty foods and invertebrates. Feed a varied diet of high-quality pellets, frozen mysis shrimp, frozen krill, and chopped squid once daily. Supplement occasionally with vegetable matter like nori sheets to balance nutrition and support digestive health.
Behavior
Active and curious fish that spend much of their time exploring the tank and investigating décor. Generally more peaceful than other triggerfish species, but still possess the typical trigger personality—they may nip at slower tankmates or harass smaller fish during feeding. Most active during dawn and dusk hours.
Breeding
Breeding Niger Triggerfish in captivity is extremely rare and difficult. They require very large tanks, specific environmental triggers, and pairs are notoriously aggressive toward each other outside of spawning season. Home aquarium breeding is not practical; virtually all specimens in the hobby are wild-caught.
Tank Mates
Hardy saltwater fish with similar water requirements; generally ignored by triggers
Fast-moving, active fish that can avoid aggression; similar salinity and temperature needs
Small but quick; may be nipped at during feeding; provide plenty of hiding spots
May be eaten; only suitable in larger tanks with ample cover and if trigger is well-fed
Aggressive enough to hold its own; similar water parameters and mid-water swimming zone
Bottom-dwelling, fast-moving; less likely to compete directly with trigger for space
Common Diseases
Ich (Marine Ich)
White spots on body and fins, rapid breathing, flashing against décor, lethargy
Raise temperature to 28-29°C, increase aeration, use copper-based medication or hyposalinity treatment; quarantine if possible
Fin Rot
Frayed or deteriorating fin edges, discoloration at fin margins, progressive fin loss
Improve water quality, perform regular water changes, use antibiotic medication if severe; ensure adequate nutrition
Velvet Disease (Oodinium)
Fine gold or rust-colored dust on body, rapid breathing, scratching behavior, lethargy
Raise temperature gradually to 28-29°C, reduce light exposure, use copper treatment or formalin; maintain excellent water quality
Mouth Rot
Redness or erosion around mouth area, difficulty feeding, visible lesions on jaw
Improve water quality and nutrition, use antibiotic medication, ensure adequate calcium and vitamin supplementation
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Quick Facts
- pH
- 8.1–8.4
- diet
- omnivore/invertebrates
- maxSize
- 18 inches
- salinity
- SG 1.020–1.025
- minTankSize
- 100 gallons
- temperature
- 75–82°F (24–28°C)
Temperature
75–82°F
24–28°C