But can anyone tell me what type of fish it is, or the equivalent of what fish I may know from UK. I mean, is it part of the Cod family, or the Haddock?

I only ask because, although I cook it just plainly with lemon juice and pepper, I'd like to find an interesting recipe for it but when I google 'sherry fish' all I get is recipes for fish cooked IN sherry LOL

Basically, I'm just curious if it has another name which I would recognise.