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Clown Triggerfish
Balistoides conspicillum
Animalia›Chordata›Actinopterygii›Tetraodontiformes›Balistidae
📍 Indo-Pacific
The most recognisable triggerfish — black body with enormous white polka dots on the belly and a striking yellow-ringed eye. Extremely aggressive and territorial; will attack hands in the tank. For experienced marine keepers only.
Care Guide
Diet
Clown triggerfish are strict carnivores requiring hard-shelled prey to maintain their powerful beak. Feed a varied diet of frozen shrimp, squid, clams, mussels, and crab at least once daily. Supplement with quality carnivore pellets formulated for triggerfish, and occasionally offer live crustaceans to encourage natural hunting behavior.
Behavior
Extremely aggressive and highly territorial, especially toward other fish and invertebrates. This species will attack tank mates, decorations, and even handler's hands during feeding or maintenance. They are bold, intelligent, and active swimmers that patrol their territory constantly; solitary housing is strongly recommended.
Breeding
Breeding clown triggerfish in captivity is extremely rare and poorly documented. They require very large tanks, specific environmental triggers, and compatible pairs—most captive specimens are too aggressive to pair successfully. Home aquarium breeding is not practical; virtually all specimens in the hobby are wild-caught.
Tank Mates
May be tolerated if introduced young, but triggerfish aggression often increases with age; monitor closely
Triggerfish may eat shrimp; only attempt if tank is very large with ample hiding
Similar risk to cleaner shrimp; triggerfish view small crustaceans as prey
Small fish are at high predation risk; only suitable in very large systems with escape routes
Similar size and temperament; both nocturnal and territorial, reducing direct conflict
Comparable aggression and size; spiny body deters attacks; both require large space
Common Diseases
Ich (Marine White Spot Disease)
White spots on body and fins, rapid breathing, flashing against surfaces, lethargy
Raise temperature to 28–29°C, perform 25% water changes daily, use copper-based or formalin treatments; quarantine affected fish
Fin Rot
Frayed or disintegrating fin edges, white or cloudy appearance on fins, reduced activity
Improve water quality with frequent changes, reduce aggression triggers, apply antibiotic treatments or medicated food if severe
Mouth Rot (Bacterial Infection)
Swollen or discolored mouth, difficulty feeding, visible lesions around jaw area
Maintain excellent water quality, provide varied hard-shelled foods to prevent beak overgrowth, use broad-spectrum antibiotics if infection spreads
Parasitic Infections
Excessive scratching, visible parasites on skin, cloudy eyes, loss of appetite
Quarantine immediately, treat with copper-free parasite medications, perform daily water changes, maintain stable temperature and salinity
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Quick Facts
- pH
- 8.1–8.4
- diet
- carnivore/hard-shelled prey
- maxSize
- 20 inches
- salinity
- SG 1.020–1.025
- minTankSize
- 180 gallons
- temperature
- 75–82°F (24–28°C)
Temperature
75–82°F
24–28°C