Photo: Wikimedia Commons contributor (CC BY-SA 2.5) — via Wikimedia Commons
Pea Puffer (Carinotetraodon travancoricus)
The world's smallest pufferfish — pint-sized, big-brained, and armed with teeth sharp enough to shred a snail.
Will it live with a Pea Puffer?
We compare each fish against your pea puffer on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- African Dwarf Frog✅ CompatiblePeaceful · 4 cm · Medium care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
- Amapá Tetra✅ CompatiblePeaceful · 4 cm · Medium care · 24–27 °C (75–81 °F)
- Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Amapá Tetra in a shoal of 6+ or it gets stressed and nippy.
- Assassin Snail✅ CompatiblePeaceful · 3 cm · Easy care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Blackwing Hatchetfish✅ CompatiblePeaceful · 3.5 cm · Medium care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Blackwing Hatchetfish in a shoal of 6+ or it gets stressed and nippy.
- Blue Danio✅ CompatiblePeaceful · 4 cm · Easy care · 21–26 °C (70–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Blue Danio in a shoal of 6+ or it gets stressed and nippy.
- Cherry Shrimp✅ CompatiblePeaceful · 3 cm · Easy care · 18–28 °C (64–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Cherry Shrimp in a shoal of 10+ or it gets stressed and nippy.
- Clown Killifish✅ CompatiblePeaceful · 3.5 cm · Medium care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Clown Killifish in a shoal of 6+ or it gets stressed and nippy.
- Crimson Red Betta✅ CompatiblePeaceful · 3.5 cm · Hard care · 24–29 °C (75–84 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Crystal Red Shrimp✅ CompatiblePeaceful · 2.5 cm · Hard care · 20–24 °C (68–75 °F)
- Compatible on the things that matter: shared water near 24–24 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Crystal Red Shrimp in a shoal of 10+ or it gets stressed and nippy.
- Endler's Livebearer✅ CompatiblePeaceful · 3 cm · Easy care · 22–28 °C (72–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Endler's Livebearer in a shoal of 6+ or it gets stressed and nippy.
- Eyespot Rasbora✅ CompatiblePeaceful · 3.5 cm · Medium care · 20–25 °C (68–77 °F)
- Compatible on the things that matter: shared water near 24–25 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Eyespot Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Glowlight Danio✅ CompatiblePeaceful · 3 cm · Easy care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
- Keep Glowlight Danio in a shoal of 8+ or it gets stressed and nippy.
- Glowlight Rasbora✅ CompatiblePeaceful · 3.5 cm · Easy care · 23–28 °C (73–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Glowlight Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Gold Ring Danio✅ CompatiblePeaceful · 3 cm · Easy care · 18–26 °C (64–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Gold Ring Danio in a shoal of 8+ or it gets stressed and nippy.
- Lambchop Rasbora✅ CompatiblePeaceful · 3 cm · Medium care · 23–28 °C (73–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Keep Lambchop Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Malaysian Trumpet Snail✅ CompatiblePeaceful · 3 cm · Easy care · 21–27 °C (70–81 °F)
- Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
- Neon Tetra✅ CompatiblePeaceful · 3 cm · Easy care · 20–26 °C (68–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Neon Tetra in a shoal of 6+ or it gets stressed and nippy.
- Northern Glowlight Danio✅ CompatiblePeaceful · 3.5 cm · Medium care · 18–24 °C (64–75 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–24 °C — no size, zone or temperament conflicts.
- Keep Northern Glowlight Danio in a shoal of 8+ or it gets stressed and nippy.
- Pygmy Corydoras✅ CompatiblePeaceful · 3.2 cm · Easy care · 22–26 °C (72–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Pygmy Corydoras in a shoal of 8+ or it gets stressed and nippy.
- Red Lip Nerite Snail✅ CompatiblePeaceful · 2 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Tail-spot Corydoras✅ CompatiblePeaceful · 3 cm · Easy care · 22–28 °C (72–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tail-spot Corydoras in a shoal of 8+ or it gets stressed and nippy.
- Tailspotted Oto✅ CompatiblePeaceful · 3.5 cm · Medium care · 22–27 °C (72–81 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tailspotted Oto in a shoal of 6+ or it gets stressed and nippy.
- Tiger Shrimp✅ CompatiblePeaceful · 3 cm · Hard care · 20–25 °C (68–77 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
- Trinidad Guppy✅ CompatiblePeaceful · 3 cm · Easy care · 19–24 °C (66–75 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–24 °C — no size, zone or temperament conflicts.
- Celestial Pearl Danio⚠️ With cautionPeaceful · 2 cm · Medium care · 22–26 °C (72–79 °F)
- Pea Puffer is semi-aggressive and may chase or nip the smaller Celestial Pearl Danio — plant heavily and break up sight lines.
- Keep Celestial Pearl Danio in a shoal of 6+ or it gets stressed and nippy.
- Chili Rasbora⚠️ With cautionPeaceful · 2 cm · Medium care · 22–28 °C (72–82 °F)
- Pea Puffer is semi-aggressive and may chase or nip the smaller Chili Rasbora — plant heavily and break up sight lines.
- Keep Chili Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Dawn Tetra⚠️ With cautionPeaceful · 2.5 cm · Easy care · 22–28 °C (72–82 °F)
- Pea Puffer and Dawn Tetra are close in size, but the semi-aggressive one tends to dominate — add dawn tetra in a group to spread the pressure.
- Keep Dawn Tetra in a shoal of 8+ or it gets stressed and nippy.
- Dwarf Spotted Rasbora⚠️ With cautionPeaceful · 2.5 cm · Medium care · 23–28 °C (73–82 °F)
- Pea Puffer and Dwarf Spotted Rasbora are close in size, but the semi-aggressive one tends to dominate — add dwarf spotted rasbora in a group to spread the pressure.
- Keep Dwarf Spotted Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Ember Tetra⚠️ With cautionPeaceful · 2 cm · Easy care · 24–28 °C (75–82 °F)
- Pea Puffer is semi-aggressive and may chase or nip the smaller Ember Tetra — plant heavily and break up sight lines.
- Keep Ember Tetra in a shoal of 8+ or it gets stressed and nippy.
- Emerald Dwarf Danio⚠️ With cautionPeaceful · 2 cm · Medium care · 20–24 °C (68–75 °F)
- Expect Pea Puffer to harass Emerald Dwarf Danio at times; give dense cover and watch them at feeding.
- Keep Emerald Dwarf Danio in a shoal of 8+ or it gets stressed and nippy.
- Exclamation Point Rasbora⚠️ With cautionPeaceful · 2 cm · Medium care · 22–28 °C (72–82 °F)
- Pea Puffer and Exclamation Point Rasbora are close in size, but the semi-aggressive one tends to dominate — add exclamation point rasbora in a group to spread the pressure.
- Keep Exclamation Point Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Green Neon Tetra⚠️ With cautionPeaceful · 2.5 cm · Hard care · 24–28 °C (75–82 °F)
- Water hardness preferences differ (Pea Puffer 5–15 vs Green Neon Tetra 0–4 dGH).
- Expect Pea Puffer to harass Green Neon Tetra at times; give dense cover and watch them at feeding.
- Keep Green Neon Tetra in a shoal of 8+ or it gets stressed and nippy.
- Hummingbird Tetra⚠️ With cautionPeaceful · 1.8 cm · Hard care · 22–27 °C (72–81 °F)
- Expect Pea Puffer to harass Hummingbird Tetra at times; give dense cover and watch them at feeding.
- Keep Hummingbird Tetra in a shoal of 8+ or it gets stressed and nippy.
- Neon Blue Rasbora⚠️ With cautionPeaceful · 2.5 cm · Medium care · 23–26 °C (73–79 °F)
- Pea Puffer and Neon Blue Rasbora are close in size, but the semi-aggressive one tends to dominate — add neon blue rasbora in a group to spread the pressure.
- Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
- Neon Green Rasbora⚠️ With cautionPeaceful · 2 cm · Easy care · 22–26 °C (72–79 °F)
- Expect Pea Puffer to harass Neon Green Rasbora at times; give dense cover and watch them at feeding.
- Keep Neon Green Rasbora in a shoal of 10+ or it gets stressed and nippy.
- Nerite Snail⚠️ With cautionPeaceful · 2.5 cm · Easy care · 22–28 °C (72–82 °F)
- Pea Puffer is semi-aggressive and may chase or nip the smaller Nerite Snail — plant heavily and break up sight lines.
- Ramshorn Snail⚠️ With cautionPeaceful · 2 cm · Easy care · 20–28 °C (68–82 °F)
- Expect Pea Puffer to harass Ramshorn Snail at times; give dense cover and watch them at feeding.
- Ruby Tetra⚠️ With cautionPeaceful · 2 cm · Medium care · 23–28 °C (73–82 °F)
- Pea Puffer is semi-aggressive and may chase or nip the smaller Ruby Tetra — plant heavily and break up sight lines.
- Keep Ruby Tetra in a shoal of 8+ or it gets stressed and nippy.
- Scarlet Badis⚠️ With cautionSemi-aggressive · 2 cm · Medium care · 22–27 °C (72–81 °F)
- Pea Puffer and Scarlet Badis can both be territorial; doable with space and dense planting, but watch for chasing.
- Strawberry Rasbora⚠️ With cautionPeaceful · 2 cm · Medium care · 23–28 °C (73–82 °F)
- Expect Pea Puffer to harass Strawberry Rasbora at times; give dense cover and watch them at feeding.
- Keep Strawberry Rasbora in a shoal of 8+ or it gets stressed and nippy.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Pea Puffer and Alligator Gar will hold territory and clash.
- Pea Puffer is bite-sized to a 250 cm predatory alligator gar — it will be eaten.
- Your 75 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
- Clown Knifefish⛔ Not recommendedAggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
- Pea Puffer and Clown Knifefish are both territorial and at least one is outright aggressive — expect serious fighting.
- Clown Knifefish (90 cm) is big enough to swallow the 2.5 cm Pea Puffer whole.
- Your 75 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Fire Eel⛔ Not recommendedSemi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
- Size gap is too large (100 vs 2.5 cm): Fire Eel will treat Pea Puffer as food.
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 75 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Koi⛔ Not recommendedPeaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
- Pea Puffer is bite-sized to a 90 cm koi — it will be eaten.
- Your 75 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
- Redtail Catfish⛔ Not recommendedAggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
- Two assertive fish, one genuinely aggressive: Pea Puffer and Redtail Catfish will hold territory and clash.
- Pea Puffer is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
- Your 75 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
- Spotted Gar⛔ Not recommendedAggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
- Two assertive fish, one genuinely aggressive: Pea Puffer and Spotted Gar will hold territory and clash.
- Pea Puffer is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
- Your 75 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
- Wels Catfish⛔ Not recommendedAggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
- Two assertive fish, one genuinely aggressive: Pea Puffer and Wels Catfish will hold territory and clash.
- Wels Catfish (300 cm) is big enough to swallow the 2.5 cm Pea Puffer whole.
- Your 75 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
- Wolf Cichlid⛔ Not recommendedAggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
- Pea Puffer and Wolf Cichlid are both territorial and at least one is outright aggressive — expect serious fighting.
- Wolf Cichlid (72 cm) is big enough to swallow the 2.5 cm Pea Puffer whole.
- Your 75 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.
Pea Puffer care specs
- Care level
- Medium
- Breeding
- Hard
- Max size
- 2.5 cm (1 in)
- Min tank size
- 40 L (10.6 gal)
- Temperature
- 24–28 °C (75–82 °F)
- pH
- 6.5–7.5
- Hardness
- 5–15 dGH
- Lifespan
- 3–5 years
- Diet
- Carnivore
- Swim level
- All
- Group size
- 3+ (shoaling)
- Family
- Tetraodontidae
- Origin
- India — endemic to the Western Ghats (Kerala; type locality: Pamba River, Travancore)
What is a Pea Puffer?
The pea puffer (Carinotetraodon travancoricus) is the world’s smallest fully freshwater pufferfish, reaching a maximum of just 2.5 cm (1 in) as an adult. What it lacks in size it compensates for in personality: pea puffers are inquisitive, interactive fish that learn to recognise their keeper, actively hunt snails with visible intent, and display constant low-level curiosity about everything in their tank.
Like all pufferfish, pea puffers possess a fused beak of four dental plates rather than individual teeth, and those plates grow continuously throughout their lives. Snails and other hard-shelled prey are essential not just as nutrition but as a means of wearing those ever-growing teeth down — a puffer with overgrown teeth cannot feed properly and will eventually starve. Their bright yellow-green body, dark brown spots, and cream belly make them one of the most visually striking nano fish available, punching well above their weight in both looks and character.
Where do Pea Puffers come from?
Pea puffers are endemic to the Western Ghats of Kerala, southern India, with the Pamba River in Travancore serving as the type locality. Their natural habitat is slow-moving, heavily vegetated freshwater — shallow backwaters, rice-paddy drains, irrigation channels and meandering lowland rivers with dense aquatic and emergent plant growth.
This habitat is warm, soft to moderately hard, and largely still or gently flowing. The dense vegetation provides both cover from predators and hunting grounds where snails and small invertebrates congregate. Understanding that origin is the key to replicating conditions in the home aquarium: thick planting, calm water, and a steady supply of live invertebrate prey are all direct translations of the wild environment.
Wild populations have declined significantly due to habitat loss and over-collection for the aquarium trade. Most fish available today are wild-caught rather than captive-bred, so sourcing from reputable suppliers who work with sustainable collection operations is worthwhile.
What size tank does a Pea Puffer need?
The minimum tank size for a small group of pea puffers is 40 litres (about 10 gallons). This accommodates a starting trio (the recommended minimum group size of three), but given the pea puffer’s semi-aggressive temperament and the importance of sightline breaks, larger is always better. A practical rule used by experienced keepers is to allow roughly 15 litres (4 gallons) per fish beyond the first two.
Because pea puffers occupy all levels of the water column, a standard rectangular tank with a good footprint is preferable to a tall one. Dense planting is not optional — it is the single most important structural element of the setup. Plants like java fern, anubias, vallisneria, and dense stem plants create the territory divisions and visual breaks that allow multiple puffers to coexist without constant conflict. Driftwood, caves and other hardscape elements add to the complexity.
Filtration should provide excellent mechanical and biological filtration while keeping the current gentle; a sponge filter or a canister with a spray bar or lily pipe diffuser is ideal. Pea puffers are sensitive to ammonia and nitrite, and their meaty diet produces a meaningful bioload, so a well-cycled tank with regular water changes is essential.
What water parameters do Pea Puffers need?
- Temperature: 24–28 °C (75–82 °F)
- pH: 6.5–7.5
- Hardness: 5–15 dGH
These parameters reflect their Western Ghats origin — warm, slightly soft to moderately hard, and close to neutral. Most dechlorinated tap water in the moderate-hardness range falls comfortably within these values without any buffering intervention. The priority, as always, is stability: gradual, consistent parameters cause far less harm than parameters that hit the ideal number one day and swing sharply the next.
Weekly water changes of 25–30% are strongly recommended given the high-protein diet and resulting waste load. Test ammonia, nitrite and nitrate regularly, particularly in the first months after setup.
What do Pea Puffers eat?
Pea puffers are obligate carnivores with a strong preference for live or frozen invertebrate prey. The single most important food is snails — bladder snails and ramshorn snails in particular. Snails serve a dual purpose: they provide excellent nutrition and their hard shells act as a natural tooth file, wearing down the pea puffer’s continuously growing dental plates. Many keepers maintain a small breeding colony of bladder snails in a separate container to ensure a constant supply.
Beyond snails, frozen bloodworms, daphnia, brine shrimp, and cyclops are all accepted and should be rotated to provide dietary variety. Most individuals can be trained to accept frozen foods reliably over time. Dry pellets and flake foods are generally refused and should not be relied upon.
Feed once or twice daily in small amounts. Remove uneaten food promptly, as a meaty diet left to decay will quickly degrade water quality.
Are Pea Puffers aggressive — and what fish can live with them?
Pea puffers are classified as semi-aggressive, but the practical reality leans toward aggressive in many situations. They are notorious fin-nippers with a particular interest in targeting slow-moving fish, fish with long flowing fins, and invertebrates. In a well-planted tank with enough space and visual breaks, a group of pea puffers can coexist with each other, though males will still spar and establish territories.
Keeping pea puffers in a species-only tank is the safest and most widely recommended approach. For keepers who wish to try a community setup, potential companions must be extremely fast, short-finned, and occupy a different zone of the tank. Ricefish (Oryzias spp.) and danios have been kept successfully by experienced hobbyists, but no pairing is guaranteed. Shrimp of any kind should never be added — they are viewed purely as food. Snails used for feeding will also be picked off.
For a detailed breakdown of what works and what doesn’t with this species, see Pea Puffer tank mates.
How do you tell male and female Pea Puffers apart?
Sexing pea puffers is reasonably straightforward in adults. Males develop a prominent dark stripe running along the centre of the belly, and behind the eyes they display distinctive iridescent “wrinkles” — small skin folds with a blue-green or yellowish sheen that are absent in females. Males also tend to be slightly slimmer in body profile.
Females are noticeably rounder and plainer, lacking both the ventral stripe and the periorbital wrinkles. When well-conditioned and ready to breed, females become distinctly plump in the belly. Juveniles of both sexes are nearly identical in appearance, making accurate sexing difficult until fish approach sexual maturity at around three to four months of age.
Maintaining a ratio of at least two females per male is strongly recommended to distribute any male attention and reduce the risk of a single female being harassed persistently.
How do Pea Puffers breed?
Pea puffer breeding is rated hard — not because the fish are unwilling, but because the logistics of raising fry successfully are demanding. Unlike many aquarium fish, pea puffers are egg scatterers: the male courts the female with a side-by-side swimming display and fertilises eggs among fine-leaved plants such as java moss or hornwort, with no parental guarding of the eggs or fry.
Triggering spawning typically requires conditioning both sexes separately on a varied live and frozen diet for several weeks, then combining them in a well-planted breeding tank. Eggs must be removed before the adults eat them — either by removing the adults immediately after spawning or by using a separate plant clump that can be transferred to a rearing tank.
Fry are extremely small and require infusoria or commercial micro-foods for the first week before graduating to baby brine shrimp nauplii and micro worms. Water quality in the rearing tank must be impeccable. Successful breeding in captivity is documented but remains a project for experienced keepers with time and equipment to commit.
What are common Pea Puffer diseases?
Pea puffers share the same common disease risks as most freshwater fish, with a few specific concerns:
Ich (Ichthyophthirius multifiliis) presents as white salt-grain spots across the body and fins and is typically triggered by temperature drops or stress. Skin flukes and internal parasites are particularly relevant for pea puffers because a high proportion of available fish are wild-caught; a prophylactic quarantine period in a separate tank is strongly recommended before introducing any new pea puffer to an established setup.
Overgrown teeth are not a disease but are the most common captive-care failure specific to this family. A puffer whose dental plates have grown too long will struggle or refuse to eat, appear lethargic, and lose condition. Prevention is simple: ensure snails and other hard-shelled prey are offered consistently as a regular part of the diet.
Bacterial infections and fin damage can result from fighting within the group or with tank-mates. These are best prevented by maintaining adequate plant density and correct group ratios.
Health note: disease identification and medication selection are beyond the scope of a care profile. For a sick fish, confirm symptoms against a reputable veterinary or fish-health source before medicating.
How long do Pea Puffers live?
With good care, pea puffers live 3–5 years. The upper end of that range is achievable with stable water quality, a varied diet rich in live and frozen invertebrate foods, correct group dynamics, and a well-planted, stress-free environment.
Because many available fish are wild-caught adults of unknown age, the age at purchase is genuinely uncertain. Sourcing captive-bred individuals where possible gives you a clearer picture of where the fish is in its lifespan. Even so, a pea puffer that settles in well and receives consistent care will reward the effort with years of bold, characterful behaviour that no other nano fish quite matches.
Frequently asked questions
Can pea puffers live with other fish?
Only with great care. They are notorious fin-nippers and will harass slow or long-finned tankmates. Most keepers run species-only setups or pair them with very fast, short-finned fish like ricefish. Avoid anything with flowing fins, and never mix with shrimp — shrimp are food.
What do pea puffers eat?
Pea puffers are obligate carnivores that need meaty foods. Snails (bladder and ramshorn) are the staple — they also grind down the puffer's ever-growing teeth. Supplement with frozen bloodworms, daphnia, and brine shrimp. Most individuals can be weaned onto quality frozen foods, but will often refuse dry pellets.
What you need to keep a pea puffer
The baseline is a heated, filtered 40 L+ tank: a reliable heater to hold 24–28 °C (75–82 °F), a gentle filter that won't batter a pea puffer in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
As an Amazon Associate we earn from qualifying purchases — buying through these links costs you nothing extra.
