Blackbar Triggerfish

This marine aquarium fish is known as Blackbar Triggerfish, HumaHuma Picasso Trigger and the correct latin name is Rhinecanthus aculeatus. It belongs to the Triggers family. (e) Origin of this species 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. We recommend you to keep it in fish tanks which 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 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 recommended pH level is between 8.0 and 8.3 since marine fish are used to these levels in general.

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
• Two Spot Goby
• Yellow Longnose Butterflyfish

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