Wild-type (Class N)
A variant of Endler's Livebearer (Poecilia wingei)

Representative Endler's Livebearerphoto — a dedicated image of this exact morph isn't available yet.
Pure Endler's livebearer from the Cumana/Laguna de Patos lineage — neon green flanks, orange 'flame' bars, and a black double-sword tail. 'Class N' denotes verified pure stock.
Keeper tips for this variant
Keep pure strains away from fancy guppies to prevent hybridising. Hard, alkaline water suits them best.