The body size of betta fish varies due to factors such as species and breeding environment. The comprehensive information is as follows:
I. Body Size Ranges of Common Species
Chinese Betta
Wild individuals typically measure 5-10 cm, and very few artificially bred ones can reach 12 cm.
Most stabilize at 5-6 cm in adulthood, with some reports stating they "don’t grow large."
Siamese Fighting Fish (Betta splendens)
Wild individuals are 5-6 cm in length, while artificially bred ones can reach 7-8 cm, and a few individuals exceed 10 cm.
They have broad fins and bright colors.
Belica Betta (artificially cultivated species)
A giant betta variety, with a body length of 13-15 cm.
II. Influencing Factors
Environmental Differences
The maximum size of wild bettas is about 11-14 cm, and artificial breeding may produce slightly larger sizes (such as speculative records of 16 cm).
Age Judgment
Adult bettas are approximately 7.5 cm in length, and juvenile bettas are about 4.5 cm.
III. Special Records
The largest wild individual is about 14-14.5 cm, and the theoretical limit for artificial breeding may reach 16 cm.