Blackbar Triggerfish

This species is known as Blackbar Triggerfish, HumaHuma Picasso Trigger and the correct latin name is Rhinecanthus aculeatus. 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

An aggressive fish.

Blackbar Triggerfish 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. It is recommended to raise this species in fish tanks that are large. (e) Medium aquariums have at least 113 Litres (30 US Gallons). Large aquariums have at least 265 Litres (70 US Gallons). Very large aquariums have at least 700 Litres (185 US Gallons).

It is easy to keep the Blackbar Triggerfish. (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 suggested level of pH (a measure of the acidity/basicity) is between 8.0 and 8.3 which is usual for most marine fish.

When Rhinecanthus Aculeatus is young it is peaceful, but when it is older it gets aggressive. It is more aggressive to own species and to the fish of similar sizes than to other fish.

A carnivore which likes small fishes, shrimp and scallop. Also accepts vegetable.















Thanks to Kenneth Leonard for the pictures. Copyright Ken Leonard.

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Related fish profiles in the database

• Balistapus Undulatus (Undulate Trigger, Orangelined, Orangetailed, Orange-Lined Triggerfish)
• 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 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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• Tips on Yellow Longnose Butterflyfish Care
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• Yellow Longnose Butterflyfish

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