Mottled / Spotted
A variant of Campbell's dwarf hamster (Phodopus campbelli)

Representative Campbell's dwarf hamsterphoto — a dedicated image of this exact morph isn't available yet.
White patches and spots breaking up any base colour, caused by the mottled (platinum) spotting gene.
Keeper tips for this variant
Keep a single mottled hamster freely as a pet, but never breed mottled-to-mottled, as the double dose is linked to lethal white-related defects; maintain the usual low-sugar diet.