Potamotrygon Motoro - "Marbled"
This is just a species variant to the P1 Motoro, and always demands a higher price due to it's pattern.
It is distinguished by having marbled in between the common ocellates.
This morph can come in hundreds of variations. Price depends on quality.

Juvenile Marble

Photo Credits: Mark Huveneers at www.potamotrygon.nl
Video credits: Mike Maranda, H20 Custom Aquatics