Blunthead Triggerfish
Pseudobalistes naufragium
Also known as: Stone Triggerfish
A giant, reef-wrecking curious personality from the Eastern Pacific.

About
The blunthead triggerfish (Pseudobalistes naufragium), also called the stone triggerfish, is one of the largest triggers you'll encounter in the hobby, capable of reaching well over two feet as an adult. It ranges across the Eastern Pacific from Baja California down through Ecuador, and there are records of it appearing as far south as Peru and Chile. In the wild it inhabits shallow reefs and sandy flats, where it uses a clever hunting technique. Blowing jets of water into the sand to expose hidden prey, or flipping sea urchins over to get at their vulnerable undersides. The diet in captivity reflects that natural opportunism, covering crustaceans, mollusks, and meaty foods generally. Personality-wise, this species runs against the aggressive trigger stereotype. It tends to be relatively calm and noticeably curious, often showing real interest in its surroundings and the people near the tank. That said, the sheer size it reaches makes housing a serious commitment, and its powerful jaws mean tankmates and decorations alike need careful consideration. This is a species for a dedicated fishkeeper with a very large, purpose-built system rather than a community reef setup.
Similar species
Other fish you might consider
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Blunthead Triggerfish get?
- The Blunthead Triggerfish reaches about 21.5–39.5" as an adult.
- What size tank does the Blunthead Triggerfish need?
- A minimum of 250 gallons is recommended for the Blunthead Triggerfish.
- What water parameters does the Blunthead Triggerfish need?
- The Blunthead Triggerfish does best with a temperature of 78–80°F, a pH of 8.1–8.4, hardness around 8–12 dGH.
- Is the Blunthead Triggerfish aggressive?
- The Blunthead Triggerfish is semi-aggressive. It can work in a community with careful tankmate choices and enough space.
- What does the Blunthead Triggerfish eat?
- The Blunthead Triggerfish is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
- How long does the Blunthead Triggerfish live?
- With good care, the Blunthead Triggerfish typically lives 7-9 years.
- Is the Blunthead Triggerfish reef safe?
- The Blunthead Triggerfish is not considered reliably reef safe and may harm corals or invertebrates.