fish Easy level

Rasbora kalochroma (Bleeker 1851)

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Clown rasbora

A larger rasbora species that lives in peat swamp and peat canals, Rasbora kalochroma can be distingushed by it’s vibrant red colour with large two dots in the body.

They are very active fish, constantly looking for insects on the surface of the water. The shape of the body is compressed and slender, the color of the back is generally orange with the belly tending to lighten to yellow.

“Easy fish” category and will accept most fish food, they also can tolerate wide range of temperature 24-28°C.

Distribution: Southeast Asia – Sumatra, Borneo and Malay peninsular.

Habitat: freshwater.

Submitted by
Andre Chandra

Water Chemistry

Water information

Water type
Fresh water
Water color
Black water
Water transparency
Concentration of sediments
Water temperature
Water flow/curent

Chemical parameters

Dissolved Oxygen


Standard length
10 cm
Water volume (min. aquarium)
200 l
Social behaviour
Group fish
Behaviour description

Ideal fish for biotope community aquarium, do consider their adult size (10cm), Rasbora kalochroma is a nice schooling rasbora best to be kept in large size aquarium and minimum 5-10 individuals.

Clown rabora is known to be the best jumper so the aquarium lid or cover must be placed to prevent them from jumping out of aquarium. A filter with medium flow is preferable.

Aggression grade
Day active
Sexual dimorphism

Rasbora kalochroma female has larger and rounder body, while the male has a slimmer body.

Nutrition in Nature

Zooplankton, worms, small insects and small crustaceans.


Breeding tank set-up

A tank with a minimum dimensions of 40x20cm or larger, a bottom mesh, moss media or fine-leaved-plants and dried Cattapa leafs can be uses as eggs substrate.

Nutrition parents

Tubifex worms, Daphnia and fish food.

Mating type
Spawning behaviour

Rasbora kalochroma is an egg scatterer. This fish don’t take care for their eggs, spawning occurs in dim lights and several spawning events will occur before the female lay all the eggs.

Breeding habits
Hatching period
Number of eggs in average
Parental care
Fry number
Nutrition fry

Infusoria for the first 10 days and brine shrimp after 10 days until they can accept normal fish food or tubifex worm.

Notes on reproduction