About the scallop thing though. I'm certain that's just an old fisherman's/wives tale. The reason this came to be is because skate tastes similar to scallop a bit with it's sweet flesh. Why is this? Skate eat scallops and crustaceans such as crabs, shrimps, lobsters, snails, other mollusks etc. You are what you eat I suppose.
In all my years I've never seen a skate being passed off as a scallop. It just wouldn't work anyway. You would see the striations running across and know it isn't a scallop. It could never pass as one.
Although I suppose I could see them marketed as "imitation scallop" as long as they were labeled as such. For people with shellfish allergies that could be cool.