Melanotaenia trifasciata

Cato stock is predominantly blue with slightly reddish fins, and male colour changes with display state.

Cato stock is predominantly blue with slightly reddish fins, and male coloration changes with display state. Other river locality forms differ in colour.

Adult length

About 8 cm (standard length, without the tail fin)

Water temperature

25–30 °C

pH

7–8

Hardness

9–19 dGH

Natural habitat

Inhabits small creeks and waterholes over rock, gravel or leaves, often near vegetation, submerged logs and branches.