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FishSaltwaterIntermediateSemi aggressive

Black-blotch Triggerfish

Rhinecanthus verrucosus

Also known as: Blackbelly Picassofish, Blackbelly triggerfish, Picassofish

A Picasso-patterned triggerfish that prefers retreat over confrontation.

Black-blotch Triggerfish
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About

The black-blotch triggerfish (Rhinecanthus verrucosus) is one of the more visually complex members of the trigger family, carrying the same bold graphic patterning that made its cousin the Picassofish famous. The body is decorated with a large dark patch across the belly and a mosaic of lines and patches toward the face. Unmistakable once you know what you're looking at. In the wild, this species ranges across a broad sweep of the Indo-West Pacific, from the Seychelles and Chagos Archipelago down through northern Australia and up toward southern Japan, where it tends to settle into rubble-strewn reef flats and sheltered lagoons rather than exposed, high-energy reef zones. It often turns up in loose groups but will just as readily go solo. What sets it apart temperamentally from many of its trigger relatives is a noticeably cautious streak. Rather than standing its ground, it tends to bolt when approached, and smaller individuals will duck straight into a crevice or hole. That said, it's still a triggerfish, and tankmates need to be chosen carefully. Give it a spacious setup with plenty of structure, feed it a varied carnivore diet, and this is a genuinely rewarding species for a fishkeeper ready to move beyond the beginner stage.

Frequently asked questions

How big does the Black-blotch Triggerfish get?
The Black-blotch Triggerfish reaches about 5.5–10" as an adult.
What size tank does the Black-blotch Triggerfish need?
A minimum of 150 gallons is recommended for the Black-blotch Triggerfish.
What water parameters does the Black-blotch Triggerfish need?
The Black-blotch Triggerfish does best with a temperature of 72–78°F, a pH of 8.1–8.4, hardness around 8–12 dGH.
Is the Black-blotch Triggerfish aggressive?
The Black-blotch Triggerfish is semi-aggressive. It can work in a community with careful tankmate choices and enough space.
What does the Black-blotch Triggerfish eat?
The Black-blotch Triggerfish is a carnivore. It needs a meaty, protein-rich diet of frozen or live foods.
How long does the Black-blotch Triggerfish live?
With good care, the Black-blotch Triggerfish typically lives 8-12 years.
Is the Black-blotch Triggerfish reef safe?
The Black-blotch Triggerfish is not considered reliably reef safe and may harm corals or invertebrates.