While I'd like it to be common skate, I think you'd need 150-200' deep water or so, like off St. Catherines.
I wonder if there are occasional monkfish (angel shark) around here? Don't recall any catch reports at all of this species!
Did a trip off Swansea in the early 80s where 5 were boated - all 40-42lb. From what I recall, it wasn't particularly deep, and they were caught with dogs and thornback. They were only boated on 50lb class gear, anything lighter and they won!
Something double the size of the biggest blonde ray would make a mess of 20-30lb class gear!
Mike