Hugely popular, this informal, pub-like place is all red brick and dark wood with old oil lamps dangling from the ceiling. On the menu are oysters, meltingly sweet scallops, lobster and langoustines sourced from its own shellfish beds, along with luscious fish such as hake, seabream and sea bass. Book ahead for dinner.
The attached Belfast Cookery School runs a diverse range of culinary classes. Mourne Seafood Bar's sister restaurant is near County Down's Dundrum Bay.