Ключевые слова: bivalve molluscs, blackish, dark blue, edible, elongated, environment, heterodont, iodinerich waters, lisbon, low tide, magoito beach, maritime, mussel, musselfilled, musselfilled formations, mytilidae, portugal, rich iodine waters, rock pools, saint john of the lamps, saltwater, shallow kiddy pools, sintra, travel,