Parosphromenus phoenicurus

The tail is somewhat diamond-shaped, with an almost triangular inner pattern; tweediei has a rounder tail.

Needs extremely soft, acidic water.

Social behaviour and territory

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

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

Sources