Slender Harlequin Tropical Fish Information

Trigonostigma espei
Slender Harlequin
Behaviour Peaceful, shoaling
Typical size 3cm
Max size 4cm
Tank Area Middle, all
Min Tank Size 45cm
Min Number 5
Temp Min: 24℃ Max: 28℃
Feeding Flake, frozen, live foods
pH Range 6-7.5
Hardness vs,s,m
Slender Harlequin Trigonostigma espei
  • Slender Harlequin Trigonostigma espei - thumbnail

Slender Harlequin (Trigonostigma espei)

Slender Harlequin Tropical Fish Learn all about the Slender Harlequin's feeding habits and food types, its behaviour, its origins, its natural habitats, is it male or female, breeding advice and information, suitable tank mates, its sizing and growth range, minimum tank size, water PH and more. Use our fish community creator tool to plan your tank set up and ensure that the Slender Harlequin is the right fish for your aquarium.

The Slender Harlequin is very similar in appearance to the Harlequin but has a narrower body and a smaller dark patch. The Slender Harlequin is very peaceful and only grows to 4cm so is best mixed with other peaceful, small fish. Provide some heavily vegetated areas and hiding spots and avoid mixing with boisterous fish. Water quality must be kept high and whilst the fish may adapt to harder water, over the long term they are best kept in neutral to acidic water with a soft to medium hardness. A good tank mate for timid or sensitive fish.

Family Cyprinidae (Minnows & Carps) | Synonyms Rasbora heteromorpha espei, Rasbora espei | Other names Lambchop Rasbora | Origin Asia; Thailand, Cambodia | Breeding Open water egg scatterers | Natural Water Conditions pH 6-6.5, medium | Natural Habitat Heavily vegetated pools, ponds, and swamps | Sexing Males are thinner and brighter coloured

Slender Harlequin Help and Advice

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Check Tankmates for the Slender Harlequin fish species

Create a test community that includes the Slender Harlequin fish species and other types you'd like to introduce - Assess tank size suitability based on filter type and volume, possible negative interactions and warnings.

Please check your water type for compatibility with your fish, which can be found on the Slender Harlequin information box.
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