Spotfin Betta
Betta macrostoma
- Vulnerable
- Card rarity: Rare
- Fish

The spotfin betta or Brunei beauty is a species of labyrinth fish endemic to the island of Borneo. It generally inhabits pools of very slow-moving water along rivers and streams in very shallow waters of 30 cm (12 in) or less. This species grows to a length of 6.7–10 cm (2.6–3.9 in) in the wild, and is occasionally found in the aquarium trade; in captivity this species regularly reaches 10.1 cm in length. It also has a rectangular body.
Classification
- Class
- Actinopterygii
- Order
- Anabantiformes
- Family
- Osphronemidae
- Genus
- Betta