Undulate Triggerfish
Undulate Triggerfish
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Quick Specs
Balistapus undulatus- Care Level
- Shop saltwater fish by care level: Easy Care Level Easy Hardy and adaptable. A great pick for newer saltwater tanks.
- Min Tank Size
- Shop saltwater fish by min tank size: 180 gal Min Tank Size 180 gal Needs at least 180 gallons as an adult. Needs a large tank with plenty of open swimming room.
- Adult Size
- Shop saltwater fish by adult size: 12 in Adult Size 12 in Grows to about 12 inches in an aquarium. Gets large. Plan the tank and tankmates around its full adult size.
- Temperament
- Shop saltwater fish by temperament: Aggressive Temperament Aggressive Adults are territorial on the reef, and in captivity this species has a reputation as one of the most aggressive triggerfishes available.
- Reef Safe
- Shop saltwater fish by reef safe: No Reef Safe No Likely to eat or damage corals and invertebrates. Best in a fish-only tank with live rock (FOWLR).
- Diet
- Shop saltwater fish by diet: Carnivore Diet Carnivore Eats meaty foods like mysis, brine shrimp, krill and quality marine pellets. Feeding recommendations range from one or two meals per day up to three. Good foodsSquidKrillChopped FishShrimp
- Origin
- Indo-Pacific Origin Indo-Pacific Native to the Indo-Pacific.
Recommended Foods
All listed sizes are approximate, not guaranteed, and may vary slightly.
Undulate Triggerfish (Balistapus undulatus)
The Undulate Triggerfish is one of the most striking and recognizable triggerfish in the marine aquarium hobby, admired for its vivid green and orange maze-like pattern and electric blue facial markings. Native to the Indo-Pacific, this species is exceptionally intelligent, bold, and highly interactive, often recognizing its keeper and eagerly greeting them at feeding time. While beautiful, the Undulate Triggerfish is also infamous for its aggressive temperament, making it best suited for experienced aquarists.
Tank Requirements
A 180-gallon or larger aquarium is recommended for adult specimens. Provide abundant live rock with caves and sturdy structures that allow the fish to establish a secure territory while leaving ample open swimming space. A tight-fitting lid is essential, and all rockwork should be securely placed, as triggerfish are powerful and may rearrange unsecured decorations.
Color, Personality, and Hardiness
This species displays an iridescent green body covered in intricate orange to yellow wavy lines, highlighted by brilliant blue markings around the mouth and fins. Extremely intelligent and fearless, the Undulate Triggerfish quickly develops a distinct personality and actively interacts with its surroundings. It is exceptionally hardy, adapts readily to aquarium life, and is highly disease resistant when maintained in excellent water quality.
Diet and Feeding
Offer a varied diet of shrimp, squid, clams, mussels, krill, silversides, and other meaty marine foods, supplemented with high-quality carnivore pellets. Hard-shelled foods are beneficial for naturally wearing down the fish's continuously growing teeth. Feed once or twice daily while avoiding overfeeding to maintain optimal health.
Tankmates and Behavior
The Undulate Triggerfish is not reef-safe and should be considered one of the most aggressive triggerfish available. It will readily prey on ornamental shrimp, crabs, snails, and other mobile invertebrates, and may nip at sessile invertebrates. It should only be housed with large, robust fish capable of defending themselves, and even then, compatibility is never guaranteed. Best results are achieved in aggressive fish-only systems where the Undulate Triggerfish is often introduced last to minimize territorial dominance.
