Skate
From Cookipedia
Skates are cartilaginous fish belonging to ray family. They are carnivorous, feeding mostly on smaller fish and crustaceans. They have flat pectoral fins continuous with their head, two dorsal fins and a short, spineless tail.
Only the wings are generally sold for consumption. Skate flesh is fine grained, white, and has a distinctive flavour. Similar to other flat fish, the cooked fish is easy to remove by scraping along the bone with a fork.