Blue-spotted Puffer
Arothron caeruleopunctatus
One of the largest puffers you can keep, and surprisingly blue.
About
The blue-spotted puffer (Arothron caeruleopunctatus) is a genuinely massive fish, capable of reaching close to four feet in length, which puts it in a league that most home aquariums simply cannot accommodate. Its range stretches across a wide swath of the Indo-West Pacific, from Reunion and the Maldives east through Indonesia and Papua New Guinea to the Coral Sea, and north as far as Japan. A distribution that spans both tropical coral reef environments and cooler temperate waters. That adaptability to a range of conditions is part of what earns it a beginner-friendly care rating, at least in terms of hardiness, though the sheer space requirement of 500 gallons or more means it is realistically a fish for public aquariums or unusually serious home setups. In the wild it tends to live a solitary existence among the reefs, and aquarium keeping mirrors that. This is not a community fish. Like other arothrons, it is a carnivore with powerful beak-like teeth built for crushing hard-shelled invertebrates, so any tankmates and décor need to be chosen with that in mind. The blue spotting that gives it its common name is genuinely distinctive and sets it apart from the more commonly seen members of its genus.
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 Blue-spotted Puffer get?
- The Blue-spotted Puffer reaches about 19–48" as an adult.
- What size tank does the Blue-spotted Puffer need?
- A minimum of 500 gallons is recommended for the Blue-spotted Puffer.
- What water parameters does the Blue-spotted Puffer need?
- The Blue-spotted Puffer does best with a temperature of 72–75°F, a pH of 8.1–8.5, hardness around 8–12 dGH.
- Is the Blue-spotted Puffer aggressive?
- The Blue-spotted Puffer is aggressive and is best kept alone or with robust tankmates that can hold their own.
- What does the Blue-spotted Puffer eat?
- The Blue-spotted Puffer is a carnivore. It needs a meaty, protein-rich diet of frozen or live foods.
- How long does the Blue-spotted Puffer live?
- With good care, the Blue-spotted Puffer typically lives 8-15 years.
- Is the Blue-spotted Puffer reef safe?
- The Blue-spotted Puffer is not considered reliably reef safe and may harm corals or invertebrates.