Pea Puffer Care Guide (2026)

Species guide

Pea Puffer Care Guide (Freshwater Dwarf Puffer)

Fish

Pea puffers (Carinotetraodon travancoricus) are freshwater dwarf puffers from slow Indian waters. They need hunting work — snails and frozen foods — not a flake community tank.

Pea puffer (Carinotetraodon travancoricus)

Freshwater
Snail hunters
5+ gal solo
Not shrimp-safe

Quick facts

Species	Carinotetraodon travancoricus (pea / dwarf puffer)
Salinity	Freshwater — not a figure-8 / green spotted puffer
Temp	22–28 °C (72–82 °F)
pH / GH	6.8–7.8, moderate hardness OK
One fish	5–10 gal heavily planted
Group	20+ gal with sight-breaks; watch bullying
Diet	Live/frozen snails, bloodworms, brine — not flakes
Lifespan	Often 4–5 years with varied food and clean water

Overview

Pea puffers look like nano community fish. They are not. They are micro-predators that dull and starve on flakes. They also murder shrimp and small snails for sport. Give them a planted species tank, not a leftover corner in a neon tetra community.

Shrimp you would lose: cherry · Neo vs Caridina · shrimp tank mates. Cycle: fishless. Goldfish are the opposite end of the hobby — goldfish setup.

Care order

Step 1 Species tank, not a community leftover
One puffer in 5–10 gal or a planned group in 20+. Add hardscape caves and plants so they can break line of sight.
Step 2 Cycle, then drip acclimate
Tiny fish still need zero ammonia. Float-and-dump kills them.
Step 3 Feed snails and frozen, rotate
Bladder/ramshorn snails are enrichment. Frozen bloodworms, mysis, brine. Fast one day a week. No flake-only life.
Step 4 Watch teeth and bullying
Puffers’ teeth grow; hard snail shells help wear them. In groups, pull extreme bullies.
Step 5 Keep water clean without copper
Gentle sponge or small HOB. No copper meds. Weekly 30% changes.

Common problems

Puffer hides and refuses food

Why: Stress, wrong tank mates, or only flakes offered.

Fix: Species tank + live/frozen. Dim lights 48 h.

Cloudy eyes or clamped fins

Why: Water quality or fluke risk from live foods.

Fix: Test water. Quarantine live snails/worms when possible.

Attacks every fish in a 10-gal community

Why: Normal hunting + tiny territory.

Fix: Rehome. Pea puffers are not tetra friends.

Starves in a ‘planted nano’ with tetras

Why: Too slow to compete at feeding time.

Fix: Feed target with a pipette after lights dim.

Tank mates (usually none)

Best: other pea puffers in a large planted tank with breaks, or snails you intend as food.
Risky: small tetras, shrimp, fancy guppies — nipped or eaten.
Never: goldfish, cichlids, or brackish puffers in the same water.
Plants: they ignore plants; use moss and stems as cover.