Undulate Trigger

This fish is known as Undulate Trigger, Orangelined, Orangetailed, Orange-Lined Triggerfish and the correct latin name is Balistapus undulatus. The family that this marine fish species belongs to is called the Triggers family. (e) Origin of this fish is Indo-Pacific. (e)

Character and suggestions regarding care

This species is aggressive towards it’s tankmates.

Undulate Trigger can grow up to 30 cm what is approximately 11 inches. So 1 specimen requires at least 3600cm² of water surface which is approximately 558 square inch. This fish should be kept in aquariums that are large. (e) Medium aquariums have at least 113 Litres (30 US Gallons). Large aquariums have at least 265 Litres (70 US Gallons). Capacity of very large aquariums is at least 700 Litres (185 US Gallons).

It is easy to keep the Undulate Trigger fish. (e) The specific gravity (SG) should be between 1,020 and 1,025, the temperature between 23°C (73.4°F) and 26°C (78.8°F). The pH level should be stable, varying between 8.0 and 8.3 which is usual for marine fish.

As already mentioned, Undulate Trigger is aggressive towards it’s tank mates. This is the reason why you should keep only this fish in the tank. Never keep it with smaller or similar sized fish.

An adult specimen







A juvenile specimen

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Related fish profiles in the database

• Balistes Vetula (Queen Trigger)
• Balistoides Conspicillum (Clown Trigger)
• Melichthys Indicus (Indian Triggerfish, Black Triggerfish, Black Finned Triggerfish)
• Melichthys Vidua (Pinktail Trigger)
• Odonus Niger (Niger Trigger, Redtoothed Triggerfish)
• Pseudobalistes Flavimarginatus (Yellowmargin Triggerfish)
• Pseudobalistes Fuscus (Yellow-spotted Triggerfish, Blue Line Trigger, Rippled Triggerfish)
• Rhinecanthus Aculeatus (Blackbar Triggerfish, HumaHuma Picasso Trigger)
• Rhinecanthus Rectangulus (Wedge-Tail Triggerfish)
• Rhinecanthus Verrucosus (Blackbelly Triggerfish)
• Xanthichthys Auromarginatus (Gilded Triggerfish, Blue Chin Triggerfish, Blue Throat Triggerfish)
• Xanthichthys Caeruleolineatus (Bluelined Triggerfish, Gold Back Triggerfish)
• Xanthichthys Mento (Redtail Triggerfish)

Recommended reading

• Saltwater aquarium heater
• Saltwater aquarium lights
• Saltwater aquarium filters
• Saltwater tank aeration
• Marine fish diseases
• Protein Simmers in the Saltwater Tank
• Setting up a Saltwater Tank
• Saltwater Fish Tanks
• Cleaner Shrimp
• Pajama Cardinals

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• Two Spot Goby
• Yellow Longnose Butterflyfish

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