While visiting Istanbul, if you like to experience casual seafood on Bosporus while quite…read moreinexpensive but delicious, this is the place to try.
Tables and chairs are not fancy, and rather small but it will be an experience worth visiting this seafood place. They serve sandwich style fish in traditional Turkish bread, fried calamari, fried mussels, stuffed mussels, and fresh salad. While they don't have alcoholic beverages, you can drink traditional Turkish Ayran, ice tea, and sodas.
If you have hard time locating it, just look across from the Austrian Consulate in Yenikoy.