Rasbora kalochroma (Bleeker 1851)

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: Medium
Concentration of sediments: Medium
Water temperature: °C
Water flow/curent: Slow

Chemical parameters

pH: 4.0
Conductivity
GH
KH
Dissolved Oxygen

Biology

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

Peacefull

Activity

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.

Reproduction

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

Polygamous

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

Substrate-spawning

Hatching period

Number of eggs in average

Parental care

Yes

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