Get a Huge Tank

All fish

Green Spotted Puffer

Dichotomyctere nigroviridis

Brackish South-east Asia

Featuring iridescent emerald colouring dotted with black spots, this intelligent puffer possesses immense charm but a notoriously pugnacious nature. Though sold in freshwater, juveniles transition to brackish conditions and require near-marine salinity as adults to maintain longevity, alongside hard-shelled food.

Also called: Burmese pufferfish, Green Puffer Fish, Spotted green pufferfish.

15 cm adult length, drawn to scale. round body.

Brackish species. Needs a little salt in the water, below full marine strength. It will not mix with most freshwater fish.

Try it in the planner Opens a tank sized to its minimum with 1 fish added.

What it needs

ItemValueBecause
Adult length 15 cm Used for the Space check: the tank must be long enough for the fish to turn round.
Smallest tank 150 L, at least 90 cm long estimated The least water and floor length this species is kept in for good, as a single fish or smallest group.
Extra water per added fish 50 L estimated What each further fish adds once the minimum is met.
Waste load Class 4 of 5 estimated How much waste an adult makes against its size. Feeds the Load check.
Temperature 24 to 28 C Stock sharing a tank need overlapping ranges.
pH 7.5 to 8.5 Compared with tankmates in the Water check.
Hardness GH 10 to 25, KH 8 to 18 Degrees of general and carbonate hardness.
Flow Medium Low-flow fish are stressed in a strong current.
Light Moderate Matched to the lighting class on the needs sheet.
Group size Single fish is fine Not a schooling species.
Temperament Aggressive Territorial: strong.
Swims in All levels Fish that use different levels share a tank more easily.
Lifespan About 12 years A fish is a long commitment.
Experience Some experience helps A guide to how forgiving the species is of mistakes.

Tags marked estimated are judged from the size and habits of the species rather than measured, so treat them as a sensible default.

Diet and tank layout

Green Spotted Puffer is an carnivore that swims in all levels of the tank. It leaves most plants alone. Give it some cover. It will eat fish small enough to swallow. It nips fins.

Tankmates

Compare any two fish on the compatibility page, or print the equipment for a stock on the needs sheet. How this is worked out: the method.