Overview
The Red-Bellied Piranha is a highly predatory fish known for its sharp teeth and aggressive behavior. It requires a large, well-structured tank with strong filtration to mimic its natural river habitat. Despite its reputation, they can be kept in community tanks with similarly-sized, peaceful species if provided with ample space and hiding spots.
Scientific Classification
| Rank | Classification |
|---|---|
| Family | Serrasalmidae |
| Genus | Pygocentrus |
| Species | Pygocentrus nattereri |
| Water type | freshwater |
Natural Habitat
Native to the rivers of South America, particularly the Amazon and Orinoco basins, they thrive in fast-flowing, rocky waters with abundant vegetation.
Appearance
Characterized by its red belly and silvery sides, the Red-Bellied Piranha has a laterally compressed body and a conical snout designed for hunting.
Behavior
These fish are not recommended for beginners due to their aggressive nature. They are solitary and can be aggressive towards tankmates, especially when food is scarce.
| Trait | Value |
|---|---|
| Temperament | aggressive |
| Schooling | No |
| Activity level | moderate |
Water Requirements
| Parameter | Ideal Range | Notes |
|---|---|---|
| Temperature | 23–27°C (73–81°F) | Use a reliable adjustable heater |
| pH | 6–7 | Avoid sudden swings |
| Hardness (GH) | 5-15 dGH dGH | Soft to moderately hard |
| Ammonia | 0 ppm | Any detectable ammonia signals a problem |
| Nitrite | 0 ppm | Toxic even at low levels |
| Nitrate | <20 ppm | Manage through regular partial water changes |
| Min. tank | 200L (53 gal) | Larger tanks are easier to keep stable |
Interesting Facts
- They are among the most famous fish due to their depiction in movies as 'Jaws' of the water.
- Their teeth are continuously replaced throughout their lives.
- They are primarily nocturnal hunters.
📋 Full Care Guide
Ready to set up a tank for your Red-Bellied Piranha? The complete care guide covers tank setup, feeding schedule, common diseases, tank mates, and breeding.
Read Red-Bellied Piranha Care Guide →Related Species
Related Species & Guides
This species profile was reviewed for biological accuracy and practical aquarium care guidance. For suspected illness or disease, test your water parameters first and consult an aquatic veterinarian if symptoms persist.