The body length of betta fish is heavily influenced by their species and rearing conditions. Here’s a detailed breakdown of the specific data:
I. Body Length Ranges of Common Species
Chinese Betta
- Wild Individuals: Typically 5–6 cm, with a maximum length of 10 cm.
- Captive-Bred: Most grow to 7–8 cm, while high-quality specimens can reach 12 cm.
Siamese Betta
- Basic Varieties (e.g., Veiltail): 5–8 cm.
- Special Varieties (e.g., Crowntail, Halfmoon): Some individuals exceed 10 cm.
Giant Betta
- Betta bellica (artificially bred): Grows to 13–15 cm.
II. Influencing Factors
Genetic Differences
- Round-tail Chinese bettas are generally 1–2 cm shorter than fork-tail varieties.
Rearing Conditions
- Water Volume: In tanks smaller than 20 liters, body length is reduced by 30%.
- Diet: Feeds with ≥40% protein content promote growth.
(Note: All data apply to healthy adult individuals. Juvenile bettas are typically 40%–60% the length of adults.)