Betta imbellis

A dark brown to black body with blue iridescence on the gill covers and fins.

A dark brown to black body with blue iridescence on the gill covers and fins. The tail lacks crossbars and has a red crescent along its outer edge; the rear anal-fin tip is red.

Adult length

Up to 6 cm (standard length, without the tail fin)

Water temperature

20–28 °C

Lifespan

3–5 years

pH

5–7.5

Hardness

1–10 dGH

Natural habitat

Found in lowland swamps, rice fields, stagnant pools and ditches, in clear to brown water.

Selected and hybrid forms occur in trade. A peaceful name does not mean an absence of aggression.