
Red-tailed Redeye Puffer
Carinotetraodon irrubesco
- Care level
- Intermediate
- Adult size
- 4.5 cm
- Minimum tank
- 54 litres
- Temperature
- 20–28 °C
Species profile
Tetraodon mbu
Common names: Mbu Puffer, Giant Puffer, Giant Freshwater Puffer

The largest freshwater puffer, at up to 75 cm. It needs close to 2,000 litres and is suitable only for a very small number of keepers.
A huge puffer with a yellow to tan body covered in a maze of dark lines, and a large head.
Sources give its maximum size as 75 cm (Seriously Fish), nearly 70 cm (Aquarium Glaser), 67 cm (FishBase) or 60 cm (OATA). Young fish look harmless and are sometimes sold without warning.
No external differences.
Plan on a footprint of 240 × 90 cm or larger, with sand, smooth rock and very heavy filtration. Few home setups can meet this.
Slow-moving but intolerant. Some fish are calmer than others, but none are safe to trust.
Keep alone.
Generally aggressive towards other fish.
Keep alone. Its beak can tear pieces from tankmates. It will eat shrimp and snails.
Prefers moderately hard, slightly alkaline water, in line with its range around Lake Tanganyika.
Eats mostly snails and shellfish, plus worms and other meaty foods.
Check the beak regularly. If it overgrows, the fish can no longer eat and the teeth may need to be trimmed by someone experienced.
Has not been bred in aquariums. A vast volume of water would be needed for a serious attempt.
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