Hyangho-ri, Jumunjin-eup, Gangneung-si, Gangwon-do, South Korea, Sea of Japan, Pacific Ocean (33º12'19''N, 126º21'58''E; provided geocoordinates displaced, corrected here to about 37º53'40''N, 128º50'09''E); intertidal zone, from algae on the rocky bottoms