This study was carried out in three coastal mangrove swamps along the Egyptian Red Sea (Fig. 1). Sharm Al-Bahary is located at 35 km south of Al-Qussier. Most of the coast of Sharm Al-Bahary is formed of medium to coarse sand while the northern part is characterized by grit stone. The tidal flat is wide, nearly horizontal and extends smoothly with very gentle slope seaward. Its bottom floor is rocky mainly from the dead coralline limestone covered with thin layer of fine sand and mud inhabited with mangrove trees. This area is very shallow and the mangrove trees were situated along the beach zone, also the area has narrow rocky tidal flat.