Fin's Fish Guide
The Blackbar triggerfish (Rhinecanthus aculeatus) is a saltwater fish of the family Balistidae that grows up to 30 cm.
Description
The white-banded triggerfish, also known as the Picasso triggerfish, is a strikingly coloured triggerfish (family Balistidae) of the Indo-Pacific. The species reaches about 30 cm and has a deep, laterally compressed body with a graphic pattern of white, black, blue and yellow bands and lines. It is common on subtidal reef flats and in shallow protected lagoons; juveniles shelter among rubble, adults defend a territory. It is an omnivore feeding on a variety of bottom organisms. It can lock the first dorsal spine upright. In parts of its range the flesh can contain ciguatera.
Frequently asked questions
How do you recognise the Blackbar triggerfish?
The Blackbar triggerfish has a flattened, disc-shaped body, is mainly multicoloured and shows a vertical stripes pattern. Strikingly graphic colour pattern; can lock the first dorsal fin spine; locally prone to ciguatera.
Where does the Blackbar triggerfish live?
The Blackbar triggerfish lives in the sea (marine waters) and is mostly found around stony or rocky ground. Indo-Pacific, on subtidal reef flats and in shallow sheltered lagoons.
How big does the Blackbar triggerfish get?
The Blackbar triggerfish grows to a maximum of about 30 cm. On average the species is around 15 cm.
Is the Blackbar triggerfish dangerous to humans?
The Blackbar triggerfish is venomous — handle spines with care and seek medical help after a sting if needed. The flesh can contain ciguatera in some tropical areas; do not eat large reef specimens from risk areas. In case of poisoning (tingling, gastrointestinal symptoms) seek medical advice.
Is the Blackbar triggerfish edible?
The Blackbar triggerfish is rarely eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Rhinecanthus
More from the family Balistidae
Want the complete picture on the Blackbar triggerfish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Blackbar triggerfish is one of 12,519 species in the app.