That's the one and only Synodontis cf "polli" from Zambia!
This is an undescribed species from Zambia, that's already bred in captivity. Like petricola it's an eggsctatterer, but it grows slightly bigger, more blocky. Other names in the LFs are Polli Zambia, sp "white Zambia" and White polli.
Again (for the umpth time I think

)
-petricola has a WHITE dorsal spine, not black, especially with juveniles. And a stretched profile, different markings and a flatter, wider head.
-multipunctatus has smooth skin, big eyes, a different profile, longer whiskers and BLACK pectoral spines!
-polli has those orange eyes, but true polli's have shorter whiskers and a wider mouth. Juvenile true polli's and "Zambian Polli's" are very hard to separate, but it can be done if you check the mouth, and of course the humerals.