At a glance the quick version
Looks how to spot one
Scaleless round pufferfish
A pea-sized, rounded puffer with small fan-shaped pectoral fins, matching rounded dorsal and anal fins set opposite each other, and a squared-off tail. It can puff itself up with water or air.23
Personality what they are like
An inquisitive, slow-swimming little hunter that does best in a species-only tank, as it tends to nip the fins of slower or long-finned fish.32
Daily activity how busy a day looks
Moves slowly around plants and the lower water layers, hunting small prey through the day.2
Grooming and care the hands-on bits
Water about 22-28 C with pH roughly 6.8-8.3 and medium-hard water. Its teeth keep growing, so small shelled snails should be offered regularly.123
Home where they are happiest
A well-planted tank; one fish can live in about 12-13 litres, with roughly 8-11 litres (2-3 US gallons) added per extra puffer. Plants such as Cabomba suit it well, mirroring its heavily vegetated home waters.32
Food basics what goes in the bowl
A meat eater: small snails with the shell on, bloodworms, mosquito larvae and other live or frozen invertebrates. Usually ignores dry foods.32
Company who they like around
Lives in large shoals in the wild, but in the aquarium males can squabble; keep one male with several females, or plenty of space and plants for a group.23
The story where it all began
S. L. Hora and K. K. Nair described the species in 1941 from the Pamba River in central Travancore. It was moved to the genus Carinotetraodon in 1999.21
Fun facts for the dinner table
Recognised by the official bits
- IUCN Red List (via FishBase)
- Vulnerable (assessed 2010).1
The care rhythm a typical week and year
A typical home-care rhythm for a Pea Puffer. A starting point, not a vet's advice.
- FeedingSmall amounts once or twice a dayevery day
- Temperature checkevery day
- Water changeAbout 25% of the waterevery week
- Water testevery week
- Glass cleanevery week
- Filter rinseRinse in old tank water, never tap waterevery month
Owner questions the things everyone asks
How often should I feed my Pea Puffer?
Furry Diary's starting plan is to feed small amounts once or twice a day. Since they are little hunters, offer just enough that they finish in a couple of minutes. For exact amounts, check the food label and ask your vet.32 Pet Wiki plan
What does a Pea Puffer eat, and what should it never eat?
They are meat eaters that love small snails with shells on, bloodworms, mosquito larvae, and other live or frozen invertebrates. They usually ignore dry foods, so avoid relying on flakes or pellets.32
How much space does a Pea Puffer need?
One pea puffer can live in about 12, 13 litres, with roughly 8, 11 litres (2, 3 US gallons) added per extra puffer. A well-planted tank with plants like Cabomba suits them best.32
What temperature, light or water does a Pea Puffer need?
Keep water at 22, 28°C with a pH of roughly 6.8, 8.3 and medium-hard water. Their teeth keep growing, so offer small shelled snails regularly to help wear them down.123
How often should I clean a Pea Puffer's home?
Furry Diary's starting plan suggests a weekly 25% water change, weekly glass cleaning, and a monthly filter rinse in old tank water (never tap water). Test the water weekly too. Pet Wiki plan
Can a Pea Puffer live with others?
They are best in a species-only tank, as they nip fins of slower or long-finned fish. In the wild they live in large shoals, but in aquariums keep one male with several females, or give plenty of space and plants for a group.23
How long does a Pea Puffer live?
They typically live around 5 years with proper care. A stable, clean environment and a good diet help them reach that age.2
Can I handle a Pea Puffer?
It's best not to handle them, as they can puff up with water or air when stressed, which is harmful. They are inquisitive little fish that enjoy watching you, so just enjoy them through the glass.23
Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Pet Wiki's own starting care plan. A friendly guide, not a vet's advice.
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Every fact on this page has a numbered source. Spotted an error? [email protected].
- FishBase: Carinotetraodon travancoricus fishbase.seused for size, origin, water parameters, IUCN, history
- Wikipedia: Dwarf pufferfish en.wikipedia.orgused for appearance, colours, lifespan, behaviour, diet, history, fun facts
- Seriously Fish: Carinotetraodon travancoricus seriouslyfish.comused for tank size, water parameters, diet, compatibility, blinking
Checked 2026-09-30. Text is written in our own words from these sources.