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Betta (Siamese Fighting Fish)
Males fight each other
Also known as: betta fish, siamese fighting fish, fighting fish
- Adult weight
- 2–4 g
- Life expectancy
- 3–5 years
- Size
- Toy
- Exercise
- Low
- Origin
- Thailand
- Group
- Tropical fish
Reference update: · Not veterinary-reviewedNo single breed standard — ranges are typical values for this group.
Health topics to discuss with your vet
- ●Fin rotBreed-specific association not yet verified.
- ●Velvet and white spotBreed-specific association not yet verified.
- ●DropsyBreed-specific association not yet verified.
Not a diagnosis or a complete risk list. A general condition reference explains a disease but does not establish increased risk in this breed or group. Unsourced associations still need verification.
Care tips
- ✓Heated (24–28 °C), filtered tank of at least 20 L
- ✓Never keep two males together
Calculators for your Betta (Siamese Fighting Fish)
Sources & review
Reference update 25 October 2026; not an independent veterinary review. Direct breed evidence is identified above. General directories below do not verify every listed health association.
Weight and lifespan are typical ranges for healthy adults from breed standards and veterinary references; individuals vary. Not veterinary advice.