On sale by the slice at the local market this evening; unsure just what it is - MrsP says name translates as a variety of stingray but looks more sharky to me
EDIT: think we've found it
Rays that look like sharks
These rays have a body that looks like a shark’s body, but their head is flattened and their paired gills are located on the underside of the head, so their English common names – wedgefish, guitarfish or shovelnose ray, depending on which family they belong to – are apt.