The mystery of the royal sole. [General]

Jan 9
Have seen "royal sole" (market name) at local grocery fish counters recently, but can't identify what it actually is (neither can the fish mongers). Anybody know what kind of fish it really is?

Jan 9
Whatever it is, it's probably mislabeled anyway :o)

Jan 9
Google says it's a sneaker. www.royalsole.com/