In Maltese, "Marsa" means harbor, and "Xlokk" (shlock) means south-east. This south-east harbor is a good place for seafood, or just to enjoy the brightly colored Luzzu or traditional boats. The Luzzu (lute-sue) are distinctive with their Phoenician "eyes" on the front.
There is a local bazar there selling touristic and traditional things like souvenirs