Day’s spiketail

Pseudosphromenus dayi

Twin dark stripes and a pointed male tail.

Two irregular dark stripes cross the brown body; males develop a central tail extension.

Adult length: Up to 6.5 cm (standard length, without the tail fin)
Water temperature: 20–28 °C
pH: 6–7.5
Hardness: 2–15 dGH

Natural habitat: Favours lowland rice fields, swamps and weedy ponds with still or slow water, also using densely vegetated river margins and ditches.

Keep at 20–28°C, pH 6.0–7.5 and 2–15 dGH, with subdued light and gentle flow.

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Appearance and identification

Mature males have longer fins and an orange lower head; females are less colourful. The labyrinth organ permits air breathing; preserve surface access. P. cupanus lacks the two dark stripes and has a less extended male tail.

Social behaviour and territory

Pairs or groups need retreats. Males commonly expel females after spawning.

Compatibility limits

Timid: avoid vigorous feeders and similarly shaped companions.

Space requirements

Allow a minimum 60 × 30 cm base. Provide caves and shade.

Aquarium environment

Plants and shelter can create shaded retreats; preserve surface access.

Diet and feeding

Offer tiny live or frozen foods; pecking dry food does not mean adequate intake.

Sources