Harlequin

Common name(s) Harlequin, Red rasbora Picture of Harlequin Rasbora
Picture of Harlequin Rasboras
Photos taken at Wharf Aquatics
© Sean Evans

Scientific name Trigonostigma heteromorpha

Synonyms Formerly known as Rasbora heteromorpha.

Size 2" (5cm)

Origin S.E. Asia

Tank setup Planted tank with small and peaceful tank mates. Subdued lighting.

Compatibility Peaceful community fish.

Temperature 22-26^oC (72-78^oF)

Water chemistry Fairly soft, slightly acidic (pH 6.0-6.5) preferred.

Feeding Omnivorous, most foods accepted - flake, granular food, micro-pellets and small frozen/live foods.

Sexing The black region on males is slightly extended and rounded at the bottom. Females have a straight edge to the black portion.

Breeding Very soft, mature acidic water required. Remove parents after spawning, eggs hatch in 24 hours.

Comments This fish is definitely seen at its best when in a larger shoal of at least 8-10 individuals. A well established aquarium with good filtration is necessary to maintain them in good condition. A second species (T. espei) has very similar markings and may also be sold under the name 'Harlequin'.

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This website was last updated on 18th January 2008

Common name(s)	Harlequin, Red rasbora	Photos taken at Wharf Aquatics © Sean Evans
Scientific name	Trigonostigma heteromorpha
Synonyms	Formerly known as Rasbora heteromorpha.
Size	2" (5cm)
Origin	S.E. Asia
Tank setup	Planted tank with small and peaceful tank mates. Subdued lighting.
Compatibility	Peaceful community fish.
Temperature	22-26^oC (72-78^oF)
Water chemistry	Fairly soft, slightly acidic (pH 6.0-6.5) preferred.
Feeding	Omnivorous, most foods accepted - flake, granular food, micro-pellets and small frozen/live foods.
Sexing	The black region on males is slightly extended and rounded at the bottom. Females have a straight edge to the black portion.
Breeding	Very soft, mature acidic water required. Remove parents after spawning, eggs hatch in 24 hours.
Comments	This fish is definitely seen at its best when in a larger shoal of at least 8-10 individuals. A well established aquarium with good filtration is necessary to maintain them in good condition. A second species (T. espei) has very similar markings and may also be sold under the name 'Harlequin'.