The 'seashell' is secluded on a narrow dark-sand beach with a warped jetty and the pastel jumble of Marina Corricella in the distance (take the steep staircase down from Via Pizzaco). This is a fish speciality restaurant with some interesting vegetable combos. Consider the stracci (thick, irregular pasta) with mussels and broccoli, perfect with the house white wine.
The sea-facing dining room is pretty casual, and in summer with the windows open the waves provide pleasant background music.