Samples were collected during September-October 2004 from the intertidal zone of all locations using a 25 × 25 cm quadrate (0.0625 m3) with a sectorial belt of 35-50 m long vertical to the coast and divided into meters, each square meter representing one sample (Boudouresque and Belsher 1997). The specimens were collected manually using a spatula; the collected specimens of each sample (square) were put in plastic bags, stored at -20º C until sorting. The specimens were later identified according to De Hass and Knorr (1979), Fischer et al. (1987), Tornaritis (1987), Riedl (1991).