The Ceylon Puffer (often sold as the Topaz Puffer) is a highly interactive but aggressive brackish water species. Like many puffers, they require hard, crunchy foods (like snails and crabs) to keep their continuously growing teeth ground down. Often falsely sold as freshwater fish, they strictly require brackish water, with adults thriving in high-end brackish or full marine conditions. They are notorious fin-nippers and are best kept in a species-only solitary setup.
Ceylon Puffer (Brackish) At a Glance
Ceylon Puffer (Brackish) Tank Requirements
Will Ceylon Puffer (Brackish) fit in your tank?
Care guides tell you what Ceylon Puffer (Brackish) needs, the next question is whether your tank can safely provide it. Test Ceylon Puffer (Brackish) against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
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Ceylon Puffer (Brackish) Water Parameters
Water care products
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Ceylon Puffer (Brackish) Temperament & Compatibility
Ceylon Puffer (Brackish) Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard
The standard representation of the Ceylon Puffer. They are highly territorial and possess a beak that can easily crush shells or nip fins. Keep solitary.
Differs in 1 trait from base species
Also known as: Wild Type, Adult
Ceylon Puffer (Brackish) Care Guide Summary
The Ceylon Puffer (Brackish), scientifically known as Dichotomyctere fluviatilis, belongs to the Puffers family group. Adults reach a maximum size of approximately 17 cm and have a globular body shape with a moderate growth rate. Classified as aggressive, this species primarily occupies the mid-level and bottom zones of the aquarium and produces a extreme level of biological waste.
To thrive, the Ceylon Puffer (Brackish) requires a brackish required aquarium with a minimum volume of 150 litres and a tank length of at least 90 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 7.5–8.5 and a general hardness of 12–30 dGH. A moderate water flow is preferred.
Due to its specialist needs, the Ceylon Puffer (Brackish) is best suited for fishkeepers who can provide a carefully planned setup. The Ceylon Puffer (Brackish) is typically available in one standard form.
Ceylon Puffer (Brackish) Habitat Setup
When setting up an aquarium for the Ceylon Puffer (Brackish), a moderate water flow best suits their natural preferences. Because this species occupies the mid-level and bottom zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour and shells for breeding and shelter.
Ceylon Puffer (Brackish) Compatibility Notes
Classified as aggressive, the Ceylon Puffer (Brackish) is best housed alone, as they do not tolerate others of their kind in confined spaces. When choosing tankmates, avoid housing with slow-moving or long-finned species that may become targets for fin nipping, ornamental shrimp are not safe companions, snails will be treated as food rather than tankmates, conspecific aggression can be intense, especially in smaller tanks, and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the mid-level and bottom zones can help reduce competition and territorial overlap.
Ceylon Puffer (Brackish) Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Ceylon Puffer (Brackish).
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
Show 9 more tank sizes
Ceylon Puffer (Brackish) Feeding & Diet Considerations
The Ceylon Puffer (Brackish) will hunt and eat ornamental shrimp, making it unsuitable for shrimp-focused setups and actively feeds on snails and can be used as a natural snail population control.
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Frequently Asked Questions About Ceylon Puffer (Brackish)
How big does Ceylon Puffer (Brackish) get?
Ceylon Puffer (Brackish) (Dichotomyctere fluviatilis) typically reaches a maximum adult size of approximately 17 cm. They have a globular body shape and a moderate growth rate.
What tank size does Ceylon Puffer (Brackish) need?
A minimum aquarium volume of 150 litres and a tank length of at least 90 cm are recommended for Ceylon Puffer (Brackish). This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Ceylon Puffer (Brackish) need?
Ceylon Puffer (Brackish) thrives in brackish required conditions with a temperature range of 24–28°C, a pH between 7.5 and 8.5, and a general hardness of 12–30 dGH. A moderate water flow is preferred.
Is Ceylon Puffer (Brackish) peaceful or aggressive?
Ceylon Puffer (Brackish) is classified as aggressive with an aggression score of 8 out of 10. Careful tankmate selection is essential to avoid conflict.
Can Ceylon Puffer (Brackish) live with others of its kind?
No. Only one Ceylon Puffer (Brackish) should be kept per tank. Keeping multiples in the same aquarium typically results in aggression and stress.
Is Ceylon Puffer (Brackish) safe with shrimp?
No. Ceylon Puffer (Brackish) is known to eat ornamental shrimp and is not recommended for shrimp tanks. Even larger shrimp species like Amano Shrimp may be at risk.
Will Ceylon Puffer (Brackish) eat snails?
Yes. Ceylon Puffer (Brackish) actively feeds on snails. While this can be useful for controlling pest snail populations, it means decorative snails should not be housed with this species.
Does Ceylon Puffer (Brackish) have any special tank requirements?
Yes. Ceylon Puffer (Brackish) benefits from shells (breeding/hiding) and sand (sifters) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Plants That Suit Ceylon Puffer (Brackish)
These plants pair well with Ceylon Puffer (Brackish) based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Dwarf Sagittaria
Sagittaria subulata
Italian Val
Vallisneria spiralis
Java Fern
Leptochilus pteropus
Jungle Val
Vallisneria americana
Lemon Bacopa
Bacopa caroliniana
Micro Sword
Lilaeopsis brasiliensis
Fish Similar to Ceylon Puffer (Brackish)
Green Spotted Puffer (Brackish)
Dichotomyctere nigroviridis
The Green Spotted Puffer is a highly intelligent but notoriously aggressive fish. While frequently (and incorrectly) sold as a freshwater species, they strictly require brackish water that increases in salinity as they mature, eventually needing high-brackish or full marine conditions as adults. They have beak-like teeth that grow continuously and must be worn down by a diet of hard-shelled foods. Best kept entirely alone.
Figure 8 Puffer (Brackish)
Dichotomyctere ocellatus
A small, highly intelligent, and interactive pufferfish known for the distinctive figure-eight pattern on its back. While often sold as freshwater fish, they strictly require a low-end brackish environment (Specific Gravity 1.005-1.008) for long-term health and a full lifespan. They are aggressive fin-nippers and strict carnivores that require hard-shelled foods (like snails) to keep their continuously growing teeth trimmed.
Fahaka Puffer
Tetraodon lineatus
A massive, highly intelligent, and extremely aggressive freshwater pufferfish native to the Nile, Senegal, and Niger rivers. Often referred to as 'water dogs' due to their owner recognition and begging behavior. They are strictly solitary pets that will relentlessly attack and kill any tank mates. They require a diet of hard-shelled invertebrates to keep their ever-growing teeth trimmed.
Arrowhead Puffer
Pao suvattii
A highly predatory freshwater pufferfish native to the Mekong basin. Named for its V-shaped, flattened head, it is a specialized ambush predator that buries itself in sand with only its eyes and upwards-facing mouth exposed. It is notoriously aggressive and will consume or fatally bite any tankmate, regardless of size. Must be kept strictly solitary.
Brown Puffer
Pao turgidus
A heavily built, strictly freshwater pufferfish native to the Mekong basin in Southeast Asia. Often sold as part of the 'Target Puffer' complex, the Brown Puffer is a notorious ambush predator. They spend much of their time lurking among plants or partially buried in the substrate waiting for prey. They are highly aggressive, strictly solitary, and possess a sharp beak capable of crushing snails and fatally injuring tank mates.
Dwarf Pea Puffer
Carinotetraodon travancoricus
The Dwarf Pea Puffer is a tiny, fully freshwater pufferfish native to India. Despite their cute appearance, they are fierce micropredators and notorious fin-nippers. Modern husbandry standards strongly dictate they are highly social and must be kept in species-only shoals of 6 or more in heavily planted aquariums to disperse aggression and reduce stress. They require a steady diet of small snails and live/frozen foods.