The plumose anemone is a rather tall sea anemone, with many thin tentacles on the top of the column. The column has an erected edge at the top. This makes the anemone look like a turtleneck collar topped off with a wig. Plumose anemones live in groups, up to 500 specimen per square meter. The entire group displays the same color, which isn't so strange if you realize that sea anemones can clone themselves. So the group is often one big family.