Bladderwrackwas photographed in the White Sea (near the city of Chupa) in mid-July. Bladder wrack is situated in the littoral (tidal zone). This type has, on the end of the stems "bubbles", filled with air, which is a concentrate of vegetable fat. This arrangement is necessary to plant that during high tide (when the water is suitable quite close) stalks were able to climb vertically, and not remain lying on the bottom. This plant is very useful for both human ka contains potassium, calcium, magnesium, zinc, sulfur, iodine, silicon, phosphorus, iron, selenium, barium and range of vitamins.