
Red-bellied piranha
Deep silver-grey body with an orange-red underside
Adult red-bellied forms are deep-bodied with prominent jaws; colour varies with age and locality.
- Adult length
- Up to 50 cm (standard length, without the tail fin)
- Water temperature
- 24–28 °C
- pH
- 5.5–7.5
- Hardness
- 2–12 dGH
- Natural habitat
- Common in creeks and interconnected ponds, also occurring in productive river waters.
Adult size and biting risk require protected equipment and careful maintenance.
Appearance and identification
The shoulder spot is smaller or absent compared with P. cariba.
Same-species behaviour
Juveniles aggregate; adults form looser hierarchies, rather than continuously hunting as a pack.
Space requirements
Suited only to public or exceptionally large private systems with substantial filtration.
Diet and feeding
An opportunistic feeder taking animal foods and some plant material.
Compatibility limits
A dedicated setup is preferable; group size does not guarantee compatibility.
Aquarium environment
Plants may be eaten, particularly around spawning.
Sources
www.fishbase.se ↗ 2026-10-25
www.seriouslyfish.com ↗ 2026-10-22
www.aquariumglaser.de ↗ 2026-10-22
api.gbif.org ↗ 2026-10-22
