Betta Breed · Thailand (domestic line)
Butterfly
Fin edges banded in contrasting colour like butterfly wings — a popular show morph.
By the WARN Research & Conservation TeamChecked against IUCN Red List & CITES sourcesLast updated
In brief
The Butterfly betta shows crisp contrasting colour borders on fin edges like butterfly wings — line-bred from halfmoon and delta stocks. Its defining trait is symmetrical fin-edge banding requiring show-quality water and fin protection in heated filtered tanks.
Butterfly: At a Glance
| Origin | Thailand (domestic line) |
|---|---|
| Size | Small (5–7 cm body) |
| Typical size | 5–7 cm (2–2.8 in); fin edge bands judged for symmetry |
| Lifespan | 3–5 years (with excellent care) |
| Fins & colour | Contrasting colour border on caudal, dorsal and anal fin rays; often halfmoon spread. Band clarity fades with fin damage or stress. |
| Temperament | Territorial, solitary, showy |
| Best suited to | Display-oriented keepers maintaining pristine solitary tanks — butterfly pattern loses value with fin tears but fish welfare remains priority. |
History & Origins
Butterfly pattern line-bred in Thailand from halfmoon stocks emphasizing crisp edge colour demarcation. IBC standards score band symmetry. Pet-shop butterfly bettas often mislabel partial banding — true symmetry is show-grade.
Butterfly Fun Facts
- Butterfly band should encircle fin edge evenly on all fins.
- Partial butterfly banding common in pet grade fish.
- Fin damage destroys butterfly pattern until regrowth — may return uneven.
- Butterfly often combined with marble — pattern instability possible.
Butterfly Common Health Issues
Conditions seen more often in this breed, and how owners and vets help manage them. This is general guidance, not veterinary advice — always speak to your vet.
Fin rot
Edge banding lost when fin edges erode.
Care: Immediate water improvement and treatment.
Poor water quality sensitivity
Stress dulls band contrast.
Care: Stable parameters and heater.
Labyrinth organ stress from cold water
Cold stress clamps fins hiding pattern.
Care: 25–28 °C stable temperature.
Bettas need heated, filtered tanks
Siamese fighting fish are sold in cups worldwide — yet they thrive in heated, filtered five-gallon-plus tanks with enrichment. Better care starts with honest information.
