All fish / Danionidae

Emerald Dwarf Rasbora

Danio erythromicron

Also known as emerald dwarf danio, crossbanded dwarf rasbora, cross-banded dwarf danio, microrasbora erythromicron, erythromicron, emerald rasbora, dwarf danio, エリトロミクロン, rasbora emerald, 红鳍翡翠灯, 翡翠鲃

This is a tiny danio with a bluish green body crossed by thin dark bars, a dark spot near the tail and orange to red fins. It is kept in planted nano tanks for its colour and lively but shy behaviour.

Care at a glance

Care level

Moderate

Temperament

Peaceful

Adult size

2.5 cm

Temperature

20 to 24 °C

pH

7 to 8

Smallest tank

40 litres

Keep as

Group of 10 or more

Diet

Carnivore: small live and frozen foods such as daphnia, cyclops and brine shrimp, plus fine dry food

Swims

Middle of the tank

Lifespan

3 to 5 years

Water

Freshwater

Wild range

Lake Inle, Myanmar

Breeding

Pairs spawn among fine plants or moss, scattering a few eggs at a time and giving no care to them. Breeding is quite easy in a mature, heavily planted tank, though fry are very small and need infusoria first.

Good to know

It is timid and often hides when kept with boisterous tankmates, and it prefers cooler, hard alkaline water. Males can spar but rarely do harm.