closeup of ulva lactuca or sea lettuce - an edible green alga in the family ulvaceae

ulva lactuca sea lettuce edible green alga fenestrat holdfast worldwide common rock shallow water black bulgaria burgas shore coast beach sand environment soup salad culinary food limu palahala fertilizer hula papahapaha dangerous ecological ecology nature biological diversity selective focus horizontal closeup sunlight summer sunny bright family ulvaceae environmental conditions spread large areas causing major public health scare decomposes producing quantities toxic gas