Parosphromenus tweediei

Its rounded caudal fin has a more regular pattern than allani and differs from the diamond-shaped tail of phoenicurus. Individuals with more blue can be confused with alfredi.

Adult length: Up to 2.5 cm (standard length, without the tail fin)
Water temperature: 22–28 °C

Natural habitat: Native to waters of Johor, Malaysia.

Juveniles have been kept at pH 4.5–6.

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Social behaviour and territory

Does not form tight schools. Pairs may be kept for breeding; groups need caves and visual barriers. Watch nest defence and subordinate fish.

Diet and feeding

Offer tiny, suitably sized live foods. Dry food is unreliably accepted; confirm the fish actually eat.

Sources

media.eaza.net ↗ 2026-10-23