Harlequin Rasbora

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Description of the Harlequin Rasbora

The Harlequin Rasbora is a very peaceful fish and an ideal choice for beginners. Ensure the tank has plenty of planting and branches to mimic its natural habitat. The Harlequin Rasbora is a schooling fish, ideally place in groups of about ten, the males will become more colorful to attract the females attention.

Popular Name: Harlequin Rasbora
Species: Trigonostigma heteromorpha

Picture of a Harlequin Rasbora

Harlequin Rasbora

Facts - Information - Picture - Video

Profile of the Harlequin Rasbora
This Profile contains interesting facts and information about the Harlequin Rasbora species.

  • Size: Up to 5cm

  • Fish Tank conditions: PH 6.0 to 7.8 Temp: 21 to 28 Degrees

  • Diet / Feeding: Dried, Frozen or Flaked Food

  • Temperament: Good Community Fish

  • Habitat: Freshwater Forest Streams and Swamps

  • Harlequin Rasbora Behaviour: Peaceful

  • Range: Sothern Thailand, Malaysia, Singapore, Sumatra

Scientific Classification of the Harlequin Rasbora
Definition: Scientific classification, or biological classification, is how biologists group and categorize species of organisms with shared physical characteristics. Scientific classification belongs to the science of taxonomy.

  • Species: Trigonostigma heteromorpha

  • Popular Name: Harlequin Rasbora

  • Kingdom: Animalia

  • Phylum: Chordata

  • Class: Actinopterygii

  • Order: Cypriniformes

  • Family:Cyprinidae

Interesting Facts and Information - How do you identify the sex of a Harlequin Rasbora?
The males and females of many fish species have different colors or different shaped bodies. But there are also other fish species where there is no visible difference. Its sometimes tricky being an ichthyologist!


Interesting Facts and Information - Why are Harlequin Rasbora slimy?
Harlequin Rasbora secrete a type of mucus, or slime, from their skin. This slime provides protection against parasites and infections and helps the Harlequin Rasbora to move through the water faster. Some fish species also release toxins in their slime which ward off enemy attacks. Other fish species use their slime to feed their young.

Interesting Facts and Information - Why do Harlequin Rasbora have gills?
Gills enable the Harlequin Rasbora to breathe. Gills consist of thin sheets of tissue containing blood vessels. As water passes over the gills oxygen is absorbed into the blood stream Carbon dioxide passes out into the water. The gills are protected by a large bony plate called an operculum. Some fish species however have lungs and breathe air.

Interesting Facts and Information -
Why do the Harlequin Rasbora have fins?
A fin is an external appendage or "limb" of a fish. Fins are used for directing, stabilizing, or propelling the different fish species in water. Numbers of fins vary between fish species, but there are usually seven. Each of the fins on a fish are designed to perform a specific function:

  • Dorsal fins - The dorsal fin is located on the backs of fishes. The Harlequin Rasbora has Dorsal fins to lend stability in swimming.

  • Ventral fins. The ventral fin is located on the pelvic area of fishes. The Harlequin Rasbora has Ventral fins to lend stability in swimming.

  • Caudal fins. The Caudal fin is located on the tail area of fishes. The Harlequin Rasbora has Caudal fins to propel through the water.

  • Pectoral fins. The Pectoral fin is located on the breast area of fishes. The Harlequin Rasbora has Pectoral fins to for locomotion and side to side movement

Interesting Facts and Information about Harlequin Rasbora

Harlequin Rasbora

  • Interesting Information about Harlequin Rasbora

  • Facts about Fish Species - Why are Harlequin Rasbora slimy?

  • Why do the Harlequin Rasbora have gills?

  • Facts about Fish Species - Why do the Harlequin Rasbora have fins?

  • Species: Trigonostigma heteromorpha

Fish Species - Harlequin Rasbora

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