Do Betta Fish Eat Other Fish?
Answer: Yes, but it depends on the circumstances.
1. Reasons for Betta Fish Aggression
Carnivorous Instinct: Wild betta fish feed on small aquatic organisms, and they retain this predatory behavior even in captivity.
Territorial Awareness: Male bettas (such as Siamese fighting fish) will attack other fish that come near, even members of their own species.
Hunger or Stress: Their aggression may increase when there is insufficient food or overcrowded living conditions.
2. Types of Fish That May Be Attacked
Small Fish: Species like guppies, neon tetras, and platy fish (easily mistaken for prey).
Long-Finned Fish: Such as angelfish and goldfish (bettas may nip at their fins).
Slow-Moving Fish: Like corydoras catfish and plecos (though they are larger in size, they are prone to harassment).
3. Considerations for Community Tank Setup
Recommended Tank Mates
Fish that swim quickly (e.g., zebra danios, cherry shrimp).
Fish of similar size (e.g., gouramis, but close observation is necessary).
Not Recommended Tank Mates
Other betta fish (fights are inevitable).
Fish that are too small or docile (e.g., baby guppies).
4. Ways to Reduce Aggression
Provide Hiding Spots: Aquatic plants, driftwood, and clay pots can help distract bettas.
Large Tank + Low Density: This reduces territorial disputes; a tank of 30 liters or more is recommended.
Separate Tanks: The safest option, especially for bettas during the breeding season.
5. Special Cases
Female Bettas: They are less aggressive, but caution is still needed when keeping them in a community tank.
Juvenile Stage: Baby bettas may be attacked by other fish and should be kept separately.
Summary
Betta fish may eat or attack other fish. When keeping them in a community tank, it is essential to carefully select tank mates and optimize the living environment. If these conditions cannot be met, keeping bettas alone is recommended.