All fish / Cyprinidae

Boraras micros

Boraras micros

Also known as three-spotted dwarf minnow, micro rasbora, boraras micros, rasbora micros, dwarf rasbora micros, yellow boraras, ボララス・ミクロス, 小型三点灯, 三点小鲃

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One of the smallest fish in the hobby, it has a pale orange to yellowish body with a dark spot at the base of the tail and further dark marks near the anal and pectoral regions. It suits heavily planted nano tanks, where a group shows natural shoaling and males display to each other.

Care at a glance

Care level

Moderate

Temperament

Peaceful

Adult size

1.5 cm

Temperature

22 to 28 °C

pH

6 to 7.5

Smallest tank

20 litres

Keep as

Group of 10 or more

Diet

Omnivore: tiny live and frozen foods such as daphnia, Artemia nauplii and microworms, plus fine crumbled flake

Swims

Middle of the tank

Lifespan

2 to 4 years

Water

Freshwater

Wild range

Thailand and Laos (Mekong basin)

Breeding

An egg scatterer that spawns among fine-leaved plants or moss with no parental care, and adults will eat eggs. Breeding is achievable in a mature, densely planted tank where some fry survive, but rearing needs infusoria-sized first foods.

Good to know

Its tiny size means it must only be kept with very small, peaceful tankmates and fed suitably small food. Imports are irregular and it is sometimes confused with Boraras urophthalmoides or other dwarf rasboras.