This is a large fish shop { Psaria Aigaiou} located across from the city's main cemetery, close to the Saturday market. The quality of fish can be variable, but regular arrivals mean that the chances of obtaining decent fish are fairly good. The attached restaurant area serves bbq fish and fresh salads. Expect basic service-plastic chairs and tables, but good honest food; it is strictly a local affair with a great atmosphere.
Choose your fish from the shop and they will cook it there and then.