All fish / Danionidae

Blackline Rasbora

Rasbora borapetensis

Also known as redtail rasbora, red tail rasbora, blackline rasbora, magnificent rasbora, borapet rasbora, black line rasbora, ปลาซิวหางแดง, ラスボラ・ボラペテンシス, 红尾波鱼, 黑线波鱼

A slim, silvery rasbora with a dark line running along the flank, a thin golden stripe above it and a bright red tail base. It is hardy, active and peaceful, making it a good shoaling fish for planted community tanks.

Care at a glance

Care level

Easy

Temperament

Peaceful

Adult size

5 cm

Temperature

22 to 28 °C

pH

6 to 7.5

Smallest tank

60 litres

Keep as

Shoal of 8 or more

Diet

Omnivore: quality flakes and small granules, with live or frozen daphnia, bloodworm and brine shrimp

Swims

Middle of the tank

Lifespan

3 to 5 years

Water

Freshwater

Wild range

Thailand, Laos, Cambodia, Vietnam and northern Malaysia (Mekong and Chao Phraya basins)

Breeding

An egg scatterer that gives no parental care and will eat its own eggs. Spawning in captivity is fairly easy in a separate soft, slightly acidic tank with fine-leaved plants or mesh, removing the adults once eggs are laid.

Good to know

Kept in small numbers it can become skittish, so keep a proper group. It is sometimes confused with other striped rasboras such as Rasbora paviana.