Dalmatian / Marble Molly
A variant of Molly (Poecilia sphenops)

Representative Mollyphoto — a dedicated image of this exact morph isn't available yet.
A white-to-silver molly speckled with irregular black spots, resembling a Dalmatian dog. The spotting pattern varies fish to fish.
Keeper tips for this variant
Spotting intensifies with good color foods and bright lighting; keep hard, slightly brackish-tolerant water for best vigor.