Canada, Newfoundland, Flat Island Harbour, Placentia Bay.
47.266667 -55.933333
47° 16' N, 55° 56' W
Growing moderately abundantly, attached to pebbles and shells in sand at depths of 4 to 6 m., in a moderately sheltered location. Water 10 to 14.5°C, air 16°C, salinity 28.5‰.