Trigonostigma heteromorpha

From The Aquarium Wiki

Harlequin Rasbora

Harlequin Rasbora
Species	Trigonostigma heteromorpha
Family	Cyprinidae
Difficulty	Moderate
Min. Tank Size	45.425 liters 45,424.941 mL 12 US Gallons (45.4L)
Size	3.81 cm 1-1.5 " (2.5-3.8cm)
sg	Freshwater
pH	6.5 - 7.2
Temp.	295.928 K 22.778 °C 532.67 °R 298.706 K 25.556 °C 537.67 °R73 -78 °F (22.8-25.6°C)
Water Hardness	6-10 °d
Stocking Ratio	1:2 M:F
Availability	Common
Diet	Omnivore Pellet Foods Flake Foods Live Foods
Life Span	3-5 years
Habitat	Asia
This animal is available captive bred

[edit] Alternative names

Harlequin Rasbora, Red Rasbora

[edit] Synonyms

Rasbora heteromorpha

[edit] Sexing

Males are more brightly coloured and have a more acute angle on its wedge of colour on its flanks. Females have rounder bodies.

[edit] Tank compatibility

A peaceful shoaling fish that should be kept in groups of 6 or more. They should not be kept with large or predatory fish like the Angelfish as they may get eaten.

[edit] Diet

They will accept most prepared foods including flake and pellets. Occasional live foods such as brine shrimp or Daphnia will ensure the best health.

[edit] Feeding regime

Harlequin Rasboras should be fed once or twice a day.

[edit] Environment Specifics

The Harlequin Rasbora does best with large open swimming space, as well as some planting. A mature tank with good filtration but not too strong a current is preferred. They prefer slightly acidic to neutral water from a pH of 6.5 to 7.0.

[edit] Behaviour

They are a peaceful mid-swimming shoaling fish. Since they are always on the move, it tends to stress other fish who prefer calmer conditions.

[edit] Identification

Trigonostigma heteromorpha is sometimes confused with Trigonostigma espei and Trigonostigma hengeli. The difference is that Harlequin Rasboras has a distinctive black "wedge" shape on its flanks with red/orange around the head and in the fins while the latter two are more slender in body shape than T. heteromorpha, and the black markings, instead of being approximately triangular, has a shape that approximates to that of a Stillson wrench. Sometimes a gold form of T. heteromorpha is seen on the market.