Prussian carp, Gibel carp, Brown Goldfish...arent those all the same thing?...sometimes its better to do the latin:
The first fish looks like a crucian crossed with a goldfish = Carassius carassius x C auratus
The last one is a brown goldfish C auratus. Might even have a touch of orange coming through.
Gibel carp i think is C.auratus gibelio