I was in a place in Leith last week and it was really good – exceptional meal / atmosphere and not especially expensive (esp if you byob). Not a specific seafood restaurant though as I remember. Good alehouse on site.
Been in The Kitchin earlier this year – top drawer Michelin star dining in terms of the food. The interior of the restaurant, though, is really average. Sort of jars with the quality of the food. Still recommended if you want to push the boat out. Personally I didn’t mind spending money on the food – £30 for a main course from Tom Kitchin is nae bother for a special occasion. I kind of balked at the wine list though.
Martin Wishart’s has always been recommended to me as the best seafood restaurant in Edinburgh, it’s another Michelin starred affair. I’ve never eaten there myself though.