Green Spotted Puffer
Dichotomyctere nigroviridis
The Green Spotted Puffer (Dichotomyctere nigroviridis) is an aggressive fish that's best left to experienced keepers. Give it a tank of at least 120 litres (32 US gallons), water held at 75-82°F, and a pH of 7-8.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Asia / South America
- East & Southeast Asia
- South America
Regional colours match the stocking calculator's origin map.
Green Spotted Puffer Tank Setup
Give them at least 120 litres (32 US gallons) - many puffers are messy and can deliver a real bite. Keep the water at 75-82°F with a pH around 7-8; a species-only tank is often the safest choice. They reach about 15 cm as adults, so don't be misled by the small juveniles sold in stores.
What Do Green Spotted Puffers Eat?
They're meat-eaters, so feed good-quality frozen or gel foods rather than relying on generic flake. Go easy on portions - leftover protein fouls the water faster than plant foods do.
Green Spotted Puffer Tank Mates
May nip fins; avoid with long-finned or slow tankmates. Predatory; may eat small fish or inverts. The Green Spotted Puffer is aggressive, which is the first thing to weigh up when you choose tank mates. It's a known fin-nipper, so avoid bettas, guppies, and other slow, long-finned fish. It's predatory, so anything small enough to fit in its mouth will be treated as food rather than a companion. Before you buy, run your full stocking list through our stocking calculator. It weighs temperament, adult size, and water needs together, which a single species page can't do on its own.
Are Green Spotted Puffers Good for Beginners?
Not a sensible first purchase. Get the tank cycled, keep easier fish stable for a year, then revisit if you still want the extra work this species demands.
Green Spotted Puffer - frequently asked questions
What size tank do Green Spotted Puffers need?
Green Spotted Puffers need a tank of at least 120 litres (32 US gallons). A bigger tank is always easier to keep stable, and gives them more room to settle in and behave naturally.
What water parameters do Green Spotted Puffers need?
Keep them at 75-82°F with a pH of 7-8, steady rather than chased to an exact figure. In a cycled tank, ammonia and nitrite should both read 0 ppm, with nitrate kept low through regular water changes.
What do Green Spotted Puffers eat?
Green Spotted Puffers are meat-eaters. Feed good-quality frozen or gel foods rather than relying on generic flake, and don't overfeed. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Green Spotted Puffers good for beginners?
Green Spotted Puffers are not a beginner species. They need precise conditions and consistent maintenance, so build experience with hardier fish before keeping them.
Common mistakes with Green Spotted Puffers
- Underestimating tank size - the minimum footprint is 120 litres (32 US gallons); impulse buying into a smaller tank leads to stress and shortened lifespan.
- Mixing with long-finned fish - Green Spotted Puffers will nip at bettas, angelfish, and other fish with flowing fins, causing stress and infection risk.
Building a community? Run the full list through the stocking calculator before you add anything else.
Great tank mates
Chosen from temperament, overlapping temperature/pH bands, plausible minimum tank footprints, and size versus yours in App-aquatic data. Hobby nuance always wins - verify stocking and temperament before purchasing.
Fish to avoid mixing with Green Spotted Puffers
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- OscarPredator - Oscar will eat or injure smaller tank mates
- Cardinal TetraSize risk - Green Spotted Puffers will likely eat Cardinal Tetra at adult size
- Bronze CoryIncompatible temperament or care requirements
