Melanotaenia nigrans

A slender blue-gray body with a dark midlateral band through the eye and a pink gill-cover patch.

A slender blue-gray body has a dark midlateral band passing through the eye and a visible pink gill-cover patch. Breeding males may develop a bright yellow tail.

Adult length

Up to 10 cm

Water temperature

18–24 °C

pH

5.2–5.6

Natural habitat

Inhabits rainforest streams, lily lagoons and quiet vegetated river margins, also occurring in brackish coastal waters.