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.
At a Glance
Tank Requirements
Water Parameters
Temperament & Compatibility
Available Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard / Unsexed
Typically sold as unsexed juveniles. Must be kept in groups of 6+ to establish a natural hierarchy. A heavily planted environment is critical to break lines of sight.
Same care requirements as the base species
Also known as: Juvenile Pea Puffer, Unsexed
Male
Mature males develop a distinct dark stripe down their belly and iridescent 'wrinkles' behind the eyes. They are fiercely territorial towards other males. It is recommended to keep only one male per 60L (15 gallons) in a shoal alongside multiple females.
Differs in 2 traits from base species
Also known as: Adult Male
Female
Females are plumper, heavily speckled, and lack the dark belly stripe. They are less aggressive than males and should make up the majority of the shoal (ideally a ratio of 2-3 females per male).
Differs in 1 trait from base species
Also known as: Adult Female
Dwarf Pea Puffer Care Summary
The Dwarf Pea Puffer, scientifically known as Carinotetraodon travancoricus, belongs to the Puffers family group. Adults reach a maximum size of approximately 3 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 high level of biological waste.
To thrive, the Dwarf Pea Puffer requires a freshwater only aquarium with a minimum volume of 60 litres and a tank length of at least 60 cm. Water temperature should be maintained between 22°C and 28°C, with a pH range of 6.5–8 and a general hardness of 4–15 dGH. A low water flow is preferred. To replicate their natural habitat, the tank should include plants - densely covered and sand (sifters).
As a schooling species, Dwarf Pea Puffer should be kept in groups of at least 6. Keepers should be aware that this species may nip the fins of slow-moving or long-finned tankmates, is not safe with ornamental shrimp, will eat snails, can be aggressive toward its own kind, and will defend a territory within the tank. This species is available in 3 varieties: Standard / Unsexed, Male, and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Similar Species
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.
Amazon Puffer
Colomesus asellus
One of the few truly freshwater, community-safe pufferfish. Native to the Amazon basin, these energetic swimmers are known for their bumblebee-like stripes and erratic swimming patterns. Unlike most puffers, they are social and prefer to be kept in groups. CRITICAL WARNING: This species has the fastest-growing teeth of any puffer. They REQUIRE a daily diet of hard-shelled foods (snails, clams, crustaceans) or they will require manual dentistry (trimming) to prevent starvation.
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.
Mbu Puffer
Tetraodon mbu
The largest freshwater pufferfish in the world, originating from the Congo River. Known for their 'puppy-like' intelligence and personality, they recognize owners and interact with them. However, they grow to massive sizes and possess a beak capable of crushing hard-shelled invertebrates. Unlike many puffers, they are true freshwater fish and do not need salt. They require massive filtration and a diet of hard foods (clams, snails) to keep their teeth trimmed.
Dwarf Neon Rainbowfish (Praecox)
Melanotaenia praecox
A brilliant, active schooling fish native to the Mamberamo River basin in West Papua. Known for their iridescent neon-blue bodies, they are an energetic and peaceful addition to community tanks. Because of their high activity levels, they require ample open swimming space alongside planted areas. They are fast eaters and may outcompete shy tank mates for food.
Dwarf Gourami
Trichogaster lalius
A peaceful to semi-aggressive labyrinth fish native to South Asia. Famous for their brilliant metallic blue and red stripes. While generally suitable for community tanks, males are territorial toward each other and similar-looking fish. They are sensitive to water quality and prone to Iridovirus if stressed. Requires access to the surface to breathe.